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Old 03-18-2013, 10:37 PM   #1
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Default Long and Short, low end needle difference

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 [email protected] 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....

Thanks
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Old 03-19-2013, 05:45 PM   #2
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Originally Posted by Dynotech Racing View Post
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 [email protected] 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....

Thanks
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.

regards
afm
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Old 03-20-2013, 12:31 AM   #3
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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.

regards
afm
Thank you for the insight.
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