Originally Posted by Dynotech Racing
Can some one tell me their thoughts on the performance difference between carbs that have long low end needles and others have short....
When the the carb is at WOT the needle is still in the carb body on the long needle version.....
Would the short needle give me more top end or rpm? Is there a noticible difference?
Is the fact that the needle@ WOT (in a long needle setup) in the body give more restriction?
I have a OS XZ-R with a short needle carb, and most of my Nova rossi stuff has long needle....
Hi. If the the longer needle is progresive in shape ending in fine point it will give you a smoother powerband with less fuel consumption. IfThe short needle is blunt at the point it will give you a more aggressive powerband, will add power at the expense of fuel consumption.