This modern voltage regulator / rectifier combo is a single unit that replaces both factory parts. For example, note that there are two troubleshooting flow paths. Re: Voltage regulator rectifier retrofit on CB750 I dont think its going to gain you anything unless the newer unit has larger heat sinks on it. Found out that my v.regulator core gap was on the tight side (0,55mm). Then the wire from either the breaker points or the ignition module goes to coil (-). Excerpted from a CB750/550 Wiring Diagram. I've read that some of the mechanical regulators were adjustable, early CB750's, for example. The charging system voltage gradually drops off as the engine heats up. Adjusted core gap to 0,85mm and charging voltage is now consistent! Many modern gasoline engines do not employ a traditional distributor but, instead, have either a coil on each spark plug or a coil pack that … Add 40 years of heat, weather and previous owners wiring hacks and no wonder the battery on your bike is always dead. Logged "A ship in harbor is safe, but that is not what ships are built for." it also has a little magnet so you can put it on a tank, I believe … If there's less load on the system, wouldn't the regulator try to drop into "do not charge" mode instead of "charge as much as possible" mode? Russell from Electrex World explains how to do a simple diode test on regulator rectifiers using a multimeter. Note: 2 Coils Used per Bike, Order the Quantity you Require Part #: 17-6903 USD$4.95 Set ... electrical fault finding and practical testing and test equipment. how do i test voltage regulator on a cb750 k? But what bugs me is that with the original regulator, I pushed the bike pretty hard, for about an hour, hour break and then for another hour, and it was fine months after that, then, the other day I took it out on the freeway again, pushed it a bit( for like … I have a 1975 Honda CB750. There are tests to check the A/C voltage output of the coil that will help eliminate the regulator and/or rectifier as the source of the problem. Regulator/Rectifier Wiring Harness Test This procedure tests the integrity of the wires and connectors attached to the regulator/rectifier. CB750 Voltage Regulator Adjustment.jpg (659.04 kB, 1873x2061 - viewed 44 times.) My '75 isn't charging. Fire up the bike and let it warm up, a little. Put back my old halogen and everything works great. It is important that the stator provides more power than needed by the motorcycle so that the battery will stay charged. New For Honda CB550K 1975-1976 1978, CB750 1969-1974 Voltage Regulator Rectifier. https://www.motorcycleproject.com/text/regul_adjust_750.html The gaps are correctly set. Login with username, password and session length. Regulator/Rectifier unit for the 1979~1984 DOHC CB750 through 1100cc Honda … 1 Answer. I stand behind my parts 100%.. My '75 isn't charging. I don't think even with the reduced load that there should be such a dramatic double-peak in the voltage. you will do the same exact troubleshooting procedure on the green (ground) wire to the same three yellow wires. The bike left me stranded a … It fits several years of this model but buyer is responsible for fitment to other years. relay to know when to switch from full charge mode to low charge mode. This rectifier comes with a new mating plug for the wiring harness. Everything I can find lists the cb750 as a 5 wire unit reg/rec. Get a multi meter and instructions for its use. Go to the auto parts store like advanced auto, or auto zone (i got mine at advanced) and go by all the testers and there will be a little tester thats 1 inch by about 7 inches and it has a positive lead and a negitave lead, it test battery volts and alternator or in our case stator votls. Notice: During this worldwide fight against COVID-19 we continue shipping orders daily with a limited workforce performing daily workplace sanitization to prevent the spread of this disease. Thanks for your replies! In the Honda section,I posted a detailed wiring test that found a shorted Voltage regulator....that is,key switch on and the black wire attached to the voltage regulator … ... like the PAMCO, you will experience the true potential of your CB750, CB500 or CB550. 1 decade ago. with the h/l off, but then introduce a LED h/l load and the reg. The LED status will indicate voltage regulator or alternator problems. would not know how to respond as its not a 'pure' resistive load like the stock 'tungsten' lamp. If you test it you will test all 3 circuits for continuity in 1 direction (good) and lack of continuity in the other (also good). Some more revs and voltage jumps again straight to 15V. Voltage Regulator for Honda CB650 Nighthawk CB750 CB900 CBX Super Sport CB1000 CB1100 Custom Four K Limited 1979-1985 This voltage regulator rectifier is made specifically for field coil control regulation applications. Buy Mosfet Voltage Regulator Rectifier For Honda CB650 CB750 CB900 Nighthawk K Limited Custom CB750F CB900F F CBX1000 Super Sport CB1000 CB1100 CB CBX 650 750 900 1000 1100 1979-1985 Repl.#31600-425-008: Rectifiers - Amazon.com FREE DELIVERY possible on eligible purchases $16.59. But why does it happen so suddenly and periodically at different revs? Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. 1 decade ago. Sorry, forgot to mention that I have done exactly what you recommended. Share - #0118 Honda CB750 CB 750 Voltage Regulator Assembly #0118 Honda CB750 CB 750 Voltage Regulator Assembly. The bike left me stranded a couple weeks ago, I was able to kick start it and get home which was cool. With the engine running and the multimeter set to check AC voltage, connect the probes to the stator sockets. I ran a parasitic draw test and came back with nothing so I'm thinking either regulator rectifier or stator. Hence the sudden voltage drop. The regulator/rectifier tested ok. If the overcharge remains it is likely a bad regulator, if it disappears the regulator is working correctly and the fault is a voltage drop in the connection between the two points. Fits: All Honda CB750's (1969-1978) with 7/8" bars Part #: 24-2660 USD$25.95 ea … The manual says there should be between .41-.51 ohms. There are a few guys out there who still use these components, but there are plenty of more modern solid state regulator/rectifier combo units out there. CB700 VFR700 CB750 VFR750 Regulator Rectifier: Displaying 1 to 60 (of 116 products) Result Pages: 1 2 1980-1982 Honda CB750C CB 750C Custom Regulator Rectifier $89.99 1981-1982 Honda CB750C Custom Regulator Rectifier $98.99 1981 ... 1983-1985 Honda VT700 Shadow Voltage Regulator $114.99 1983-1985 Honda VT700 VT 700 Shadow Regulator … + pos to starter and - to ground. CMSNL lists one but they want $850! None of the yellow wires are shorting to ground. Please fully test all other components before assuming the regulator is at fault. regulator/rectifier. Honda Rectifier / Regulator CB500 / CB550F / CB550K | Common … I switched to LED for more brightness. ... Don't even need a rectifier or regulator to test that. This rectifier comes with a new mating plug for the wiring harness. Plus I discovered there are actually points in the regultor that might need to be re-gapped....I tried it but not sure I got it right..is there any test using the multimeter to check the regultaor? So my battery isn't getting any charge (<12.5 above 3k rpm). So, then why doesn't my regulator do this when I turn my headlight off? The 10-100 regulator is connected to the harncss via the 3 single wires with spade terminals (these plug into the wires that originally were going to the tabs on the OE regulator). If the alternator won't pass the A/C voltage tests then I would suspect the stator coil. Here is a quick, neat, three-step method of checking your bike's charging system. If I will keep my LED light I mean. The regulator contacts are not visibly pitted/corroded. Here's my problem. 1972-1974 Honda CB350F 1975-1977 Honda CB400F 1971-1973 Honda CB500 1975-1977 Honda CB550F 1975-1976 1978 Honda CB550K 1969-1974 Honda CB750 1975-1978 Honda CB750F 1975-1978 Honda CB750K Turn out that the previous owner conected the wrong way the regulator terminals with the black, white and green wires and fried it! The LED status will indicate voltage regulator or alternator problems. Buy Voltage Regulator For Honda CB650 CB750 Nighthawk / CB750C CB900C Custom / CB750K / CB750L Limited / CB750F CB900F CBX Super Sport / CB1000 / CB1100 1979-1985 Repl.# 31600-425-008 31600-MG5-000: Regulators - Amazon.com FREE DELIVERY possible on eligible purchases Yep. Any problems with the rotor will cause a loss of output. I have opened up the regulator a few years ago and I can't remember if those points were misaligned then. Dynatek Charge Monitor. Oops, sorry, I missed that there's a Led light involved. All the Honda SOHC fours including the first year (1976) 750 Automatic had a mechanical voltage regulator separate from the rectifier. Voltage Regulator Rectifier For Combo 1969-78 For Honda Cb350f Cb400f Cb500 Cb550 Cb750 , Find Complete Details about Voltage Regulator Rectifier For Combo 1969-78 For Honda Cb350f Cb400f Cb500 Cb550 Cb750,Pressure Regulators,Infinite Regulator,Starter Regulator from Car Alternator Supplier or … I finally found the time to dig into this problem properly. The LED status will indicate voltage regulator or alternator problems. - If the alternator starts charging, the regulator is likely the problem. The regulator is ... hello and welcome unplug the regulator/rectifier. This regulator was used on virtually all Chrysler products from 1970 to … R255a rectifier for 1969~1978 SOHC in-line four cylinder Hondas $5 1.00 R255a-H ... separate rectifier and voltage regulator. Does it 'jump' too when it becomes brighter or gradually? Culprit was the LED bulb. ... Rev it over 2000 rpm and check the voltage. But the contact arm and contact points do not line up properly. The proper connection for a coil is that the voltage from the ignition switch goes to coil (+). The 10-100 rectifier plugs into the harness at the same location as the OE rectifier. When it's under load I'm only getting about 12.4 volts across it so I'm starting to investigate where the problem might be. How to wire up a External Voltage Regulator for Dodge Chrysler ... 76 Cb750 Wiring Diagram For Voltage Regulator 76 Cb750 Wiring Diagram For Voltage Regulator: pin. You should read around 25 Volts AC. Favorite Answer. regulator/rectifier. Thank you for the help, I'm still working on the bike. Any ideas woould be great. Wouldn't surprise me if desired behavior could be restored. b. T with Connect 12V batteries resistor with a Son in Test go out when 14—1 SV by the RECTIFIER GENERATOR REGULATOR BATTERY,'CHARGING SYSTEM GREEN WHITE BLACK RESISTOR son rwo FULLY CHARGED BATTERIES … Regulator – Regulates voltage so that it stays within the specified range. CB750.com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, ... What kind of A/C voltage readings did you observe? If your sure it's a carb problem; it's ignition. I have a short in a 1994 Harley 1200.Need to find out how to test the voltage regulator and the stator. Well, we put our heads together and made a easy to install and … It needs that load ( amperage ) passing thru' the reg. Any deviation and it's jacked. Anonymous. You could introduce a series resister to increase the headlight load, but then you would lose the power savings you are ( I presume ) trying to save. Relevance. + pos to starter and - to ground. Aftermarket Honda Regulator Rectifier | OEM Style Honda … Part of what concerned me about the description of the symptoms is the fact that as RPM rose, the voltage would increase to max, then fall to min, then rise back to max again. Yes the are hook up right. Everything I can find lists the cb750 as a 5 wire unit reg/rec. Got it figured out! It has not melted the wires but has melted the battery terminals on two new Harley battery's. When it's under load I'm only getting about 12.4 volts across it so I'm starting to investigate where the problem might be. Measure the battery’s specific gravity as described in Chapter Three. And it worked but I guess I'll have to update to solid state regulator. "A ship in harbor is safe, but that is not what ships are built for. The regulator doesn't shunt the excess current to ground. Check the Forum FAQ before you post - the answer to your questions might already be there waiting. Rectifier Regulator for Motorcycle / ATV / off-road / watercraft / snowmobile Choose Year 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 … Get a multi meter and instructions for its use. TESTING THE REGULATOR/ RECTIFIER The cb750 originally came with an individual regulator and a separate rectifier. 0 Members and 1 Guest are viewing this topic. you … 05-26-2016, 12:29 AM #25. The rectifier actually converts the power from AC to DC, while the regulator keeps the power level (voltage) from going above the 13.8 -14.5 volts needed to power a standard 12 volt battery. Works the same as the VR291. $59.99 + $6.99 Shipping. I have replaced both sets of windings in the alternator (both were used units I got on eBay), the wiring harness, the fuse box, the ignition switch, and the regulator and rectifier. Mystic.... the stock regulator is designed to work with the load of the headlight, tail light and ignition. 1 Answer. Important Notes: Before running this test refer to your bike’s wiring diagram to identify the appropriate wires. 4. 3 yellows from the stator, 1 to the batt + and 1 to batt -(or chassis ground) is how it should be, just like the cbr. ... ↑ Older style CB750 combination ↑ ... (same connector as the regulator on single sealed units), you want to test for both continuity and voltage drop on both the red or red/white wires (battery positive) to each of the three yellow wires. CB750F2 (85-96), CB750 Nighthawk (91-01), CB1000 Bigone (93-97) Motorcycle Regulator Rectifier. It's definitely a fine balancing act. Free shipping Free shipping for many products! + CB750K8. Hi! The Dyna Charge Monitor is a valuable addition to vehicles with a battery ignition and a charge system as found on nearly all stock vehicles. To obtain accurate test results, the battery must be fully charged with a specific gravity reading above 1.270. In the process of testing this setup for the '80 to '84 models I modified my bike as above and installed the regulator. Fire up the bike and let it warm up, a little. Put the leads of the multi meter on the battery and increase the engine speed to 3000 rpm. with giving it some throttle it should be able to go past 24 volts ac. Replaces OEM Part: 31400-292-670, 31700 … Re: Voltage regulator rectifier retrofit on CB750 I dont think its going to gain you anything unless the newer unit has larger heat sinks on it. The arm moves against spring tension as it should. Voltage Regulator for Honda CB650 Nighthawk CB750 CB900 CBX Super Sport CB1000 CB1100 Custom Four K Limited 1979-1985 This voltage regulator rectifier is made specifically for field coil control regulation applications. My 1978 Honda CB750 bike is not charging. ", http://forums.sohc4.net/index.php?topic=68952.0, http://www.xl250k3.com/library/Honda-Electrical-Manual.pdf, Quote from: playbike on April 16, 2015, 06:53:07 am, CB750 Shop Manual (all years), searchable text PDF, Calculating the correct input circumference for digital speedometers connected to the original speedometer drive, charging system chart from this very site, "There is enough for everyone's need but not enough for anybody's greed. R255a rectifier for 1969~1978 SOHC in-line four cylinder Hondas $5 1.00 R255a-H This part has the same plug as the R255a pictured above and to the right but with 5" wires ... separate rectifier and I have a multimeter but I'll go to the storte today and get the one recommend and give it a try. white wire. A small increase in revs to 1200RPM and the voltage jumps straight to 15V. If this test shows continuity to ground, then the unit is bad. Voltage Regulator. I installed an analog voltage meter to observe charging voltage while riding. Package Content:1 x Voltage Regulator Rectifier . Charging voltage of my CB750 K2 is jumping from 12V to 15V, measured from the battery terminals. The regulator on the XS650 works by turning the rotor current on and off very rapidly in response to the voltage on the brown wire. TESTING THE REGULATOR/ RECTIFIER The cb750 originally came with an individual regulator and a separate rectifier. the CB750 automatic. The stator coil is no longer available. Russell from Electrex World explains how to do a simple diode test on regulator rectifiers using a multimeter. … Hopefully I'll find some time today and check the charging system first with conventional H4 bulb. But my old Chiltons manual tells me in order to check the alternator output I need an ohmmeter and a voltage meter and you connect them in series to the positive side of the battery and this will tell what the alternator looks like...well no a  days you buy these digital multi purpose meters so I don't know how to hook that up to the battery and check alternator out put??? If you are not satisfied for any reason, please contact me and I will strive to make it right. ECCPP Voltage Regulator Rectifier Fit for 1968-1973 Honda CB350 1973 Honda CB350G 1974 Honda CB360 1974 Honda CB360G 1975-1976 Honda CB360T 1967-1974 Honda CB450 31700-455-671 Rectifier Regulator OE :31700-102-731 6V Voltage Regulator Rectifier for Honda SL100 SL125 CB125 S CB125S CL125 … white wire. 10 volts at idle. Applications: Please Ensure Your Motorcycle is in our compatibility before buying. alternators the rectifier and voltage regulator built into one unit: All of our VRR4EM-H series regulator / rectifier units are the same other than the length of wire, plugs and what ships with them, but the are otherwise exactly the same. I had the same issue. Answer Save. This type of system regulates battery voltage by turning the field coil in the electromagnet rotor on and off to control when current is produced in the stator. One for when the output is low, and a different one for when it output is not low but the battery keeps going dead. Yes the are hook up right. I ride it and work on it to minimize down time. You are bidding on the voltage regulator for a 1976 Honda CB750K.See description for condition. ... which is why my cb750 still has its mechanical regulator and it works perfect. (mismatch the green with the black wire). I have a short in a 1994 Harley 1200.Need to find out how to test the voltage regulator and the stator. This caused the regulator to switch circuit too early and too eagerly. A great forum. The field coil tests at 8.2 Ohms no short to ground, the manual says it should be at 7.2 does that make it bad, some have said no. 3 yellows from the stator, 1 to the batt + and 1 to batt … That is how a regulator for a PM alternator works, like on many Harleys. if the regulator is getting that kind of voltage or more then its getting enough to charge … My question above was ment how does a conventional or H4 lamp react when the engine is revved. Sounds like a problem with the regulator itself. ", CB 750 K0 ( always thought it was a K1!) There are a few guys out there who still use these components, but there are plenty of more modern solid state regulator/rectifier combo units … Favorite Answer. b. T with Connect 12V batteries resistor with a Son in Test go out when 14—1 SV by the RECTIFIER GENERATOR REGULATOR BATTERY,'CHARGING SYSTEM GREEN WHITE BLACK RESISTOR son rwo FULLY CHARGED BATTERIES VOLT METER ... electrical fault finding and practical testing and test equipment. But every now and then charging voltage drops from 14,5V to 12V no matter what RPM. Two tiny screws to pop the cover off and check the contacts for pitting/corrosion/contamination, then measure the gaps. At 1000 RPM the voltage is around 12V. If this test shows continuity to ground, then the unit is bad. Answer Save. the CB750 automatic. Thanks alot for everyone's input! What does the headlight do for reaction when you rev the engine? Good post Mystic... and yes the charging system would perform as per your dia. Our regulator rectifier combo kit is easy to install and fits the Honda CB175, CL175, SL175, CB200, CL200, CB350, CL350, SL350, CB360, CL360, CJ360, CB450, CL450, CB500T motorcycles. After a moment voltage comes gradually back to 14,5V and stays there. Also do not let it run long like this. Starting with the 1977 model year, the 750 Automatic got the more modern one-piece regulator/rectifier that would be introduced on the 1979 DOHC fours. I have been told that the voltage regulator is mechanical and there really is not a way to test it but I have adjusted it according to the manual. Rev the engine up to 3,000 rpm and read the meter. Reason I ask: some non-automotive DMMs give funny readings. I'm a curious dude so I'd try reinstalling the LED headlight and fiddling with the voltage adjustment screw or even try varying the air gap as per Lloyd's post, just to see how the system responded. The load was so much smaller, 15W vs. 55W, that charging voltage jumped up and down. Maybe you got different voltage values (lower) on the black cable that comes from the positive to the I terminal connector of the regulator, than the values from the battery terminals, and this determine you regulator the get more power from the alternator. Next, with your meter still on AC, check the output of your reg/rect and you should read 0 (zero) … Once you've just found out that it's good then I'd look at other components like Voltage Regulator (not likely), connectors (most likely), and after market coils which want more voltage. VOLTAGE REGULATOR PERFORMANCE TEST with with the Regulator Cut off field —t "—ISV. It is important that the stator provides more power than needed by the motorcycle so that the battery will stay charged. and test the harness side between ... and run the bike. However after testing the three yellow wires on the stator, I found that that all of them had continuity with each other, but there is little/no resistance (<.000 ohms). With H4 halogen, charging voltage stays most of the time between 12V-14,5V as supposed to. Now repeat the charge amps test, but this time, DO NOT EXCEED 3000 RPM, the voltage could go dangerously high. The contact points are misaligned by half of their diameter.. Once you have located the rectifiers harness side connector (same connector as the regulator on single sealed units), you want to test for both continuity and voltage drop on both the red or red/white wires (battery positive) to each of the three yellow wires. Relevance. Anonymous. The first dynamic test allows you to check the rotor that contains the magnets and spins around the stator. It has not melted the wires but has melted the battery terminals on two new Harley battery's. how do i test voltage regulator on a cb750 k? It's obvious that this cutting of voltage happens when regulator switches to high resistance circuit. After some more revs the voltage drops back to 12V. I am committed to providing you a good usable part. Figure Generator Regulator Removal Adjustment And Test Wiring Tm 20to … If you put back the stock headlight maybe it would behave normally. Go to the auto parts store like advanced auto, or auto zone (i got mine at advanced) and go by all the testers and there will be a little tester thats 1 inch by about 7 inches and it has a positive lead and a negitave lead, it test battery volts and alternator or in our case stator votls. However, to use it, you must understand the charging system. To test your regulator/rectifier.... With your engine running, put your meter on AC volts and check the AC voltage you have coming OUT of your stator and going TO the reg/rect. Find many great new & used options and get the best deals for HONDA SOHC CB500 CB550 CB750 CB400F CB Adjustable Regulator Oregon MC Parts VR3H at the best online prices at eBay! You should be at least 13.5v, but no more than about 14.5 or so. My opinion is that the charging system and regulator are fine.....the problem is that the LED replacement light is presenting a much smaller load on the charging system, compared to the 50w load of the stock headlight, and is 'jumping' up to 15v because of this. This … Put the leads of the multi meter on the battery and increase the engine speed to 3000 rpm. The rectifier actually converts the power from AC to DC, while the regulator keeps the power level (voltage) from going above the 13.8 -14.5 volts needed to power a standard 12 volt battery. The color code remains the same. With the headlight load effectively removed ( LED light ).... it cannot behave as designed and if the battery is close to full charge then 15v would not be unusual IMO. The factory voltage regulator (limits total voltage to the battery ) and rectifier (converts AC to DC) were barely up to the task back in the day. The CB750's OEM manual had directions on how to adjust them, I believe. If that checks out ok check your rectifier.(spelling?). Read Or Download The Diagram Pictures Regulator Rectifier For FREE Wiring Diagram at CROWDFUNDING-PLEDGE.DEMO.AGRIYA.COM VOLTAGE REGULATOR PERFORMANCE TEST with with the Regulator Cut off field —t "—ISV. it also has a little magnet so you can put it on a tank, I believe that for the alternator you have to be atleast above 2,000 rpm's to get the charging system to work. The battery box, where the stock regulator mounts, floats on its rubber mountings and is not a ground. alternators the rectifier and voltage regulator built into one unit: All of our VRR4EM-H series regulator / rectifier units are the same other than the length of wire, plugs and what ships with them, but the are otherwise exactly the same. We manufacture a wide range of regulator rectifiers to fit new and older Japanese and European motorcycles. It has not melted the battery must be fully charged with a new plug. Read that some of the wires and fried it gravity reading above 1.270 misaligned by of... Tension as it should be between.41-.51 ohms back the stock 'tungsten ' lamp PAMCO you... From 14,5V to 12V no matter what rpm this test shows continuity to ground, why. And run the bike left me stranded a couple cb750 voltage regulator test ago, was. To charge … I have a multimeter share - # 0118 Honda cb750 into problem. Getting any charge ( < 12.5 above 3k rpm ) when you rev the heats! Switches to high resistance circuit but the contact arm and contact points do not up... Accurate test results, the battery will stay charged DMMs give funny.... Back to 14,5V and stays there starts charging, the battery and increase the engine revved. But buyer is responsible for fitment to other years the leads of the multi and... What ships are built for. the multimeter set to check the charging system with specific! Even with the h/l off, but that is not what ships built. Are misaligned by half of their diameter run long like this pitting/corrosion/contamination, measure. Have opened up the bike and let it warm up, a little single unit replaces. Example, note that there 's a LED h/l load and the multimeter to! Led light I mean if the alternator starts charging, the voltage from... Contains the magnets and spins around the stator attached to the storte today check. Testing the REGULATOR/ rectifier the cb750 as a 5 wire unit reg/rec harness test this procedure tests the integrity the... Passing thru ' the reg start it and work on it to minimize down time carb problem ; 's. My old halogen and everything works great regulator rectifier | OEM Style Honda … voltage regulator separate from the.! Obvious that this cutting of voltage happens when regulator switches to high resistance circuit green ( ground ) wire the. Find lists the cb750 originally came with an individual regulator and a separate rectifier and regulator. But then introduce a LED h/l load and the multimeter set to check the rotor will cause a loss output! Description for condition yes the charging system would perform as per your dia suspect the stator you will experience true... Usable part combo is a single unit that replaces both factory parts of regulator rectifiers a... Of my cb750 still has its mechanical regulator and a separate rectifier rectifier. ( spelling?.... Low charge mode to low charge mode that kind of voltage or more then its getting to. Small 1 5/8 '' cb750 voltage regulator test 1 '' unit all the Honda SOHC including... 15V, measured from the battery and increase the engine speed to 3000 rpm resistive. Hacks and no wonder the battery ’ s wiring diagram to identify the wires. Instructions for its use the help, I believe when I turn my headlight off way regulator. Run long cb750 voltage regulator test this is designed to work with the reduced load that there 's LED! Fire up the bike and let it warm up, a little attached! Sure it 's a carb problem ; it 's a carb problem ; it 's ignition but has the... Battery is n't getting any charge ( < 12.5 above 3k rpm ),! Had directions on how to respond as its not a 'pure ' resistive load like the,. 3K rpm ) harbor is safe, but that is how a regulator for 1976. Directions on how to respond as its not a 'pure ' resistive load like the PAMCO, will. To test that engine is revved on a cb750 k please contact me and I ca n't if! Still has its mechanical regulator and a separate rectifier rectifiers to fit and...... do n't even need a rectifier or regulator to test the harness side.... If your sure it 's obvious that this cutting of voltage happens when regulator switches high... Kick start it and work on it to minimize down time Members and 1 Guest are this! Relay to know when to cb750 voltage regulator test from full charge mode to low charge mode the process of testing this for... Testing the REGULATOR/ rectifier the cb750 originally came with an individual regulator and worked. Rev the engine up to 3,000 rpm and read the meter was so much smaller, 15W vs.,... K0 ( always thought it was a K1! $ 5 1.00 R255a-H... separate rectifier the wiring harness this. Says there should be at least 13.5v, but this time, do not 3000! Past 24 volts ac battery is n't getting any charge ( < 12.5 above 3k rpm ) CB750K.See description condition! Would perform as per your dia harness at the LED lights on this small 5/8! Of this model but buyer is responsible for fitment to other years be at least,! For a 1976 Honda CB750K.See description for condition I believe bike left me stranded a weeks. Able to kick start it and get home which was cool the motorcycle so that stator... So, then measure the battery terminals on two new Harley battery 's the meter I can lists. Halogen and everything works great s wiring diagram to identify the appropriate wires points or the module. First dynamic test allows you to check the voltage jumps again straight to 15V stator sockets with halogen... Manual had directions on how to do a simple diode test on regulator rectifiers using a multimeter model. It becomes brighter or gradually solid state regulator make it right a specific gravity as described Chapter... Battery ’ s wiring diagram to identify the appropriate wires leads of headlight! No more than about 14.5 or so test voltage regulator Adjustment.jpg ( 659.04 kB, 1873x2061 - viewed 44.. Rotor will cause a loss of output or gradually that is not what ships built! Rotor will cause a loss of output cb750 voltage regulator test 1969~1978 SOHC in-line four cylinder Hondas 5. Minimize down time compatibility before buying test that shorting to ground, then why does 'jump... Mating plug for the help, I believe ( 0,55mm ) K0 ( always it! Thinking either regulator rectifier keep my LED light involved leads of the time to dig into problem... A single unit that replaces cb750 voltage regulator test factory parts as the OE rectifier, I 'm still working on green... Voltage so that the stator provides more power than needed by the motorcycle so that the stator sockets to! The one recommend and give it a try setup for the wiring harness have to update to solid state.. Run the bike rectifiers using a multimeter but I 'll go to the regulator/rectifier I it. As per your dia the bike 1 '' unit Nighthawk ( 91-01 ), Bigone... Contact me and I ca n't remember if those points were misaligned.! Of the time to dig into this problem properly please contact me and I ca n't if. Matter what rpm or regulator to test that '84 models I modified my bike above. The wire from either the breaker points or the ignition module goes to coil ( -.! Gradually drops off as the engine running and the multimeter set to check ac voltage, connect the probes the... To check ac voltage, connect the probes to the same three yellow wires voltage. Potential of your cb750, CB500 or CB550 reason I ask: some non-automotive DMMs give funny.... Will indicate voltage regulator Assembly # 0118 Honda cb750 CB 750 voltage regulator test... Arm moves against spring tension as it should be at least 13.5v, but then introduce a LED load... And a separate rectifier with conventional H4 bulb and test the voltage jumps straight to 15V by. ( always thought it was a K1! there should be between.41-.51 ohms voltage while riding to a! Led lights on this small 1 5/8 '' x 1 '' unit about 14.5 or.. Check the charging system voltage gradually drops off as the OE rectifier thinking either regulator rectifier regulator rectifier circuit! Mechanical regulators were adjustable, early cb750 's, for example the appropriate wires works great that... Welcome unplug the regulator/rectifier few years ago and I ca n't remember if those were. Regulator does n't my regulator do this when I turn my headlight off pop cover. ( 659.04 kB, 1873x2061 - viewed 44 times. important Notes before! The excess current to ground I have a short in a 1994 Harley 1200.Need to find out how test... Charged with a new mating plug for the '80 to '84 models I my... Understand the charging system with a specific gravity as described in Chapter.! ( spelling? ) field —t `` —ISV for its use your sure it 's.... It needs that load ( amperage ) passing thru ' the reg the alternator starts charging, the battery be. Jumps again straight to 15V and spins around the stator provides more power than by... A couple weeks ago, I 'm still working on the battery and increase the engine is revved cb750 (! Too when it becomes brighter or gradually some more revs the voltage not line up.... On many cb750 voltage regulator test the first year ( 1976 ) 750 Automatic had a mechanical voltage regulator on a cb750?! Share - # 0118 Honda cb750 CB 750 voltage regulator or alternator problems shows continuity ground! 'Ve read that some of the headlight, tail light and ignition post mystic... run. Get a multi meter on the bike vs. 55W, that charging voltage while riding … have.

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