Edelbrock pumper carb BRP

1 reply to this topic
  • nvccsup

Posted January 24, 2002 - 05:29 PM


I Need some assistance. How do you know when the needle needs changing? Top end performance? Anyone?

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

Posted January 25, 2002 - 11:40 AM


If you're bike is running excellent, then obviously your needle won't need to be changed. If you're getting consistent popping upon deceleration, you may be running too lean. If you're engine is running too hot, you may also be running too lean. If performance is sluggish, you may be running too rich, etc. Your spark plug will also be one of a couple indicators to tell you if your bike is running too rich or too lean.

If you're trying to hone in on the top end performance and wondering if your bike is too lean or too rich, take your bike for a ride and run close to WOT for a good stretch, then pull in your clutch and hit the kill switch to immediately shut down your bike. Then pull the spark plug and inspect it to help guide you on your tuning. Depending upon the your current spark plug's condition, it may also help to first install a new spark plug before you do this. Here's a couple links for you to check out that has some good information and pictures about reading spark plugs.




Related Content


Which thumper motor for a street tracker? by woz

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

Can anyone identify this xr600 piston? by ms_mtn24

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

Fell Off Trailer by usafxr

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  43 replies

ignitech programmable XR650L CDI by brianhare

Dirt Bike   Make / Model Specific   Honda   XR600/650
  • Hot  60 replies

What was your path to Beta? by officialhopsof

Dirt Bike   Make / Model Specific   Beta
  • Hot  79 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.