Tail ilght dimming when engine is reved

4 replies to this topic
  • Paul2005

Posted March 06, 2007 - 06:20 PM


Hi All,

Have a problem with the back tail light dimming when the engine is reved, i think it might be the regulator but the front lights are not dimming! does anyone know if the front lights go through the regulator as well? if they don't i wouold guess it the regulator / rectifier thats gone. Whats everyone think

Many thanks

  • cleonard

Posted March 06, 2007 - 06:30 PM


It could be a poor connection. Revs make vibrations and that might be making a poor connection worse.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • porterdog

Posted March 06, 2007 - 08:55 PM


does anyone know if the front lights go through the regulator as well?

Hard to say with no information about your bike...

  • Paul2005

Posted March 07, 2007 - 08:18 PM


sorry porterdog its an 97 xr600

good point cleonard i did have problems before with the connection but i thought i done a good job repairing it, must go over the connections again

  • bigredxr

Posted March 08, 2007 - 03:31 AM


Put a dvom on the battery and see if the voltage drops when u whack the throttle. Your looking for a signicant drop also 9.6 to 10 volts. If it does the ignition system is pulling the voltage to fire the ignition and this would indicate a weak charging circuit. Also check your battery static voltage 12.2-12.4volts. 13.4 to 14.2 approx when running. Our take 2 sec. and have it tested. Also like u said check all connections at pwrs and grds. good luck:thumbsup:

Related Content


What was your path to Beta? by officialhopsof

Dirt Bike   Make / Model Specific   Beta
  • Hot  79 replies

Wiseco 101MM Spark Knock Low Engine Temps by imandrewparks

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 7 replies

Which thumper motor for a street tracker? by woz

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • * * * * -
  • Hot  29 replies

Engine Loping/Sputtering by tcaldwell

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • 2 replies

ignitech programmable XR650L CDI by brianhare

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  57 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.