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Old 12-13-2010, 10:06 AM   #1
johnmccrary
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Rectifier Regulator Issue

I was told that the reguator was the problem but, how do I determine that trully is he issu and not something more significant? Thanks for your help. The motorcycle is a 2002 Triumph Daytona 955i
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Old 12-13-2010, 10:26 AM   #2
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The rectifier can be tested fairly simple. Have the motorcycle running and test the voltage at the battery. When you rev the engine, the voltage should go up a little. If it does not go up and starts going down after a few minutes, it's definitely a charging system problem and it's probably the rectifier. You can also get the manual to see which wires to test for a resistance check. That will also tell you if the rectifier is bad. Check your wiring harness coming from the stator/rotor assembly and the wiring harness where the rectifier connects. Sometimes you have a short at the molex connections and the problem will keep happening. Also check the voltage output of the stator/rotor to make sure that is not the problem. Again, the manual will point out which wires to test and what the output should be.
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Old 12-13-2010, 10:32 AM   #3
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http://www.triumphrat.net/speed-trip...r-upgrade.html

Here is all the info you will need. DEcosse is a mad man with these bikes.
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Old 12-13-2010, 10:34 AM   #4
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if you dont have an account i highly suggest you sign up. There is a wealth of knowledge on that website.

PS you should have bought my bike....lol
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Old 12-13-2010, 10:58 AM   #5
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http://www.offwidth.co.uk/bike/gener...lt_finding.pdf

follow that and you will figure out exacly whats wrong with your charging system,.

also let me add on my 2003 R6, i was never able to get my voltage to read by the book when testing them until i completely removed my ground cable from the whole wiring harness, and replaced it with a much much thicker gauge wire. Now i Get 13.8 volts on my battery at idle, and 14.3-14.5 when revving to 5k RPM, exacly what it should be in the r6 manual

Last edited by cheefar6; 12-13-2010 at 11:00 AM.
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Old 05-28-2011, 08:03 AM   #6
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Same problem for my cbr 900 :(

I am going for the 5th rectifier...WTF!!!!

I believe the bike is giving a signal too high for the rectifier to handle it
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Old 09-06-2011, 10:14 AM   #7
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Quote:
Originally Posted by signpimp View Post
The rectifier can be tested fairly simple. Have the motorcycle running and test the voltage at the battery. When you rev the engine, the voltage should go up a little. If it does not go up and starts going down after a few minutes, it's definitely a charging system problem and it's probably the rectifier. You can also get the manual to see which wires to test for a resistance check. That will also tell you if the rectifier is bad. Check your wiring harness coming from the stator/rotor assembly and the wiring harness where the rectifier connects. Sometimes you have a short at the molex connections and the problem will keep happening. Also check the voltage output of the stator/rotor to make sure that is not the problem. Again, the manual will point out which wires to test and what the output should be.

How do you figure that the voltage going down after a few minutes is attributed to the rectifier? The same issue would arise from a bad stator if nothing is wrong with your rectifier.

If the rectifier is bad, more than likely you will be getting too much voltage to your battery.
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Old 09-06-2011, 10:19 AM   #8
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The older 3-wire stators should give around 70 volts when reved up to 5K, checked across any set of the three... you need to test all 3 combinations

Then check output to the battery with CLEAN connections. You are looking for around 13.5-14.5 V when reved to 5K or so.

If it does point to the R/R, a good, cheap upgrade is the later style Mosfet off a Honda.
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