Question about 1995 Honda CBR 900 RR Fireblade

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I have a 96 Honda CBR900RR and I have redone almost everything on it. I hooked the engine back up and the battery won't stay charged. It will stay charged until everything is running then it cuts off and won't start back. On the engine the stator and the rectifier are both very hot. I do not have a voltage regulator on it because there was not one on there when I got it. I have been reading that maybe it should have one. I thought the Rectifier/Regulator did that but maybe not. Any advise as to why I can't keep it charged even after it starts let me know.

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  • Honda Master
  • 40,820 Answers

The stator produces ac power which is rectified by the rectifier pack to dc power which is what the electrics uses
the voltage regulator controls the voltage to 14.5-14.8 volts dc
the voltage regulator by controlling the voltage also controls the maximum out put from the stator or the current being produced to charge the battery and run the lights and what ever else you have connected
hot stator and rectifier indicates uncontrolled out put so take it to an accredited bike electrician and have it fixed properly
have the battery load tested as uncontrolled output will boil a battery and ruin it

Posted on Apr 30, 2017

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Posted on Jan 02, 2017

  • 10 Answers

SOURCE: the bike wont run unless you charge the battery first

Double check your battery. It could be bad and not holding a charge... If it's good then you can move to the generator. An easy way to check the generator is to get a voltage meter and put one lead on the pos and the other lead on the neg (while the bike is running), the voltage meter should read approx 14volts. If not, then you know the generator isn't putting out enough power to charge the battery. Then check all wiring back to the stator. Hope the stator isn't bad because I remember it being pretty expensive. Good luck...

Posted on Jun 14, 2009

  • 221 Answers

SOURCE: wire connector between stator & voltage reg/rectifier burnt

your voltage/reg. can be tested in a couple different ways check ground res. check res. then revs. bias on diodes you have ac in dc out it sounds like you may have a diode gone bad allowing ac curent to flow causing the wires to get hot

Posted on Jul 31, 2009

wd4ity
  • 4565 Answers

SOURCE: which post is which on generator on a 1975 sportster?

the post should be the same as an original. The wires should be green and tan. Green wire goes to the post towards the front wheel and the tan to the post nearest the engine. Don't forget to "polarize" the generator before starting. procedure is in the service manual. Momentarily short between the battery positive post and the field terminal.

Posted on Sep 24, 2009

  • 16 Answers

SOURCE: Faulty regulator rectifier- can't start the bike

I have a '07 C90T.
I have just replaced my stator. I replaced the reg/rectifier earlier this year. I replaced the battery one year ago in October.

I firmly believe what started the problem. Two guys that I told I didn't need help, but they pressured me to let them help. They hooked a battery backwards to my bike. A lot of people believe that's what shortened the life of the rectifier and stator.

But keep this in mind. The connections for the regulator/rectifier are not waterproof. I had done a lot of rainy riding and I first found a burnt connector on the discharge side of the reg/rect. My mechanic told me I needed to replace the reg/rect so I did but I soldered the wires and made them waterproof. I didn't do this on the stator side of the reg/rect and a few months later, when the bike quit charging again, I found that connector burnt, so I cut it out and soldered and waterproofed it.

Two days after we got back from a 700 mile round trip to Red River, NM, my bike quit charging again. This time though, I have a voltage meter on the bike, so I was aware of the problem before the bike could strand me someplace. Get one of those btw.
When I checked the old stator after I replaced it, I found the stator good but the pulse signal generator bad. It's required that you replace both btw. You have to, they are joined at the grommet.

Ok well, the battery cost $60 last year and I replaced it myself.
The reg/rect cost $140 through my mechanic and I replaced it myself.
Got the stator online for $173 shipped and they advertise a better stator that puts out 20% more power.
Not counting little things like solder, tape, heatshrink and such, I'm out a little less than $375 on my charging system.
I hope it's a done deal.
Again, some think the problems began when the battery was hooked up wrong, but I lean to believe the sub-standard Suzuki connections may have a hand in this.
Hope this helps. . . Joe

Posted on Sep 28, 2009

wd4ity
  • 4565 Answers

SOURCE: connecting wire from regulator

The large wire from the voltage regulator goes to the Positive side of the battery. As an alternative, you can also connect it to the starter where the large cable comes from the battery positive terminal to the starter. I think that's where most Softail models have the regulator wire connected.

If you connect it to the starter, all this does it make it a bit easier to connect since the battery is inside the horseshoe type oil tank. Basically, you are using the battery cable as an extension cord to the battery to keep from having to fish the wire up to the battery.

Posted on Feb 01, 2010

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