| Author |
Message |
    
Woodman
| | Posted on Monday, January 18, 2010 - 11:19 pm: | 
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what is causing my xb12ss to have high voltage i also have installed a new voltage regulator and still high voltage ,please help |
Sparky
| | Posted on Tuesday, January 19, 2010 - 05:15 pm: |
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Could be the VR is not completely grounded meaning that the VR ground wire may not be making a solid 0.0 ohm connection to the engine/frame or the VR is defective.
What voltage are you seeing and where are you measuring?
Is there an AC component to it? |
Woodman
| | Posted on Tuesday, January 19, 2010 - 11:01 pm: |
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i am testing across the battery , at idle it is like 13.2 when reved 3000 rpm and held there it gradally starts to climb till about 17.8- 18.0 volts i have checked all my connections. help stumped |
Sparky
| | Posted on Wednesday, January 20, 2010 - 08:53 pm: |
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On the tubers the VR ground connection was made through one of the VR mounting bolts, a "star washer" and a dedicated ground wire attached to the engine. Here it is imperative that a clean metal-to-metal connection was made with the ground wire and the crankcase.
The XB's, however, make the VR ground connection with a dedicated wire to the grounding point on the engine or frame. I'm not sure where your model has its ground point. My '03 XB9R has 2 main grounding points and both need clean metal-to-metal connections.
If I were you I'd find the grounding points, unscrew the screws and meticulously clean the ring terminals and engine/frame spots, then reassemble.
If this doesn't fix it, then I'm afraid the VR is toast unless it can be determined that there is a discontinuity in one of its wires. The VR is nonrepairable.
Have you done stator voltage and isolation-to-ground tests and they pass? |
Woodman
| | Posted on Wednesday, January 20, 2010 - 11:28 pm: |
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checked the stator and got 26volts ac at about 2500 rpm , i dont understand how the stator can be bad and make high voltage but i am not a motorcycle mechanic . is there a way to test the vr ? b/c its like 2days old . seems to me like the vr trying is working b/c it builds slowly to about 14.2 volts then it just goes right up fast to 17-18 volts (i need to fix it myself b/c times are tight if ya know what i meen), but thanks for the help so far. |
Reepicheep
| | Posted on Thursday, January 21, 2010 - 12:15 pm: |
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The stator can't cause high voltage. It's the VR, or a VR connection.
(Or maybe a downed power line  ) |
Sparky
| | Posted on Thursday, January 21, 2010 - 02:13 pm: |
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Something's not right. What year is your bike? According to the 2003 XB9R manual, with the regulator disconnected, the stator AC test should be 32-40 VAC at 2000 rpm. 26 VAC is low and out of spec unless later XB12 models are spec'd differently.
Woodman, do you have the service manual for your bike? If not, can anyone verify correct stator AC volts test at 2000 rpms?
If I'm right about the low VAC, I going to suggest the following: Possibly the stator is grounded (defective) and the VR is not properly grounded thus possibly causing the VR to not regulate properly.
There would have to be two faults though and considering that the high voltage problem is a pre-existing condition (i.e. it existed before installing the present VR), there must be some other fault with the charging system. Unless of course, the present VR is defective.
So, I would suggest doing this simple test:
1) disconnect VR from stator.
2) connect ohmmeter lead to any stator socket.
3) with meter on RX1 scale put other lead on engine ground.
4) results should be NO continuity (infinity ohms) on any stator socket and ground.
If stator fails this test, replace stator. |
Sparky
| | Posted on Sunday, February 07, 2010 - 04:11 pm: |
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Woodman, any update? |
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What is causing my bike to have high voltage