Lil note from X-Cycles

[Piute]

Just like pistons, carburetors are working hard. Slides are moving up & down, being pulled & pushed with intake pulses constantly wearing the inside of the needle jet.

The needle jets and needles are very precise and wear is immeasurable. The detection of this problem is sometimes difficult. (Unless you spend a $100.00 per hour on a Dyno.)

When you drive a bike at normal speeds, you are generally in the pilot circuit, slide cutaway, needle jet and in the needle a bit. These circuits work together delivering fuel to your motor. A little wear in the needle jet and needles is why some bikes with open exhaust, open air filters SOMETIMES run better with almost stock jetting. We wrote a tech article on exhaust systems and tuning and basically said: Select an exhaust system you like and jet accordingly with an open mind. Same with this needle jet, needle topic: Do not go into jetting a bike with a preconceived idea about jetting. Keep an open mind.  

We do not know if needle jets & needles are still available or if you really need them.

This was just a story and maybe this will help someday