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possible reg/rect problem?

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Old 06-12-2009, 2:19 PM
  #1
 
Join Date: 06-12-2009
Location: london,england
Bike(s): 1994 cbr 900 rr
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possible reg/rect problem?

hi guys,im new to this honda stuff by only a week (always had r6's) and i've already got my first fireblade related prob. i've got a '94 900rr and while riding home from work i noticed the speedo wasn't working. i thought no more about it and continued riding. as i went for an overtake the bike started misfiring. this seems very much like a reg/rect prob i had on my yamaha. also,i noticed that when i turned the headlights off it ran perfectly without misfiring and the speedo came back to life.so headlights on,bad. headlights off,good.i flicked the switch on and off a few times to confirm. i replaced a flat battery last week and when i got home the bike started fine. any help or ideas would be much appreciated! thanks people!

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Old 06-12-2009, 2:58 PM
  #2
 
Join Date: 05-02-2009
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Re: possible reg/rect problem?

Did you check it with a volt meter while the bike was on and off?

Sounds like it's not getting enough power under load.
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Old 06-12-2009, 4:05 PM
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Re: possible reg/rect problem?

right,just checked the reg/rect,its burnt to a crisp but so is the plug. my next question is if i replace it,will it burn out again (i.e,why does it happen) and is it possible to get a plug from honda? if i could find a volt meter what sort of voltage am i looking for?
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Old 06-12-2009, 4:12 PM
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Join Date: 05-02-2009
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Re: possible reg/rect problem?

If it's burnt I'd say you found your issue.

But voltage should be 12v+ off, 13v+ while the bike is running, check at the batt.

Dealer or salvage for the plug.
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Old 06-12-2009, 4:14 PM
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Re: possible reg/rect problem?

Burnt plug, too much power, then it all fried = side effect of bad r/r.
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Old 06-12-2009, 4:16 PM
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Re: possible reg/rect problem?

how did too much power get to it? if i put a new one on,whats to stop it burning out again?
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Old 06-12-2009, 4:18 PM
  #7
 
Join Date: 05-02-2009
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Re: possible reg/rect problem?

Replace both, the plug got burnt because of the r/r not working properly.
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Old 06-12-2009, 4:29 PM
  #8
 
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Re: possible reg/rect problem?

cool,thanks for your help.i'll be down at my local dealer first thing.
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