What jet should i use for a 2002 yamaha blaster with a Pro Circuit Platinum header and a 304 pro circuit silencer with a K&N air filter. i have heard that you dont need a jet kit all you need is the main jet im getting the main jet from JetsRUs.com could someone please help me out with this?

 

Hey welcome the forums.

Got a couple question for ya. Airbox lid on or off and what your elevation?

 

You do need to know the above info that Koopa asked, you also need to know where to put your needle clip. It doesn't need any parts but you need to make a call and see what notch it should be placed in. If you bought the pipe new it should give you a guideline of what to run. We run a Toomey B1 exhaust, we have a 340 main jet and the needle clip in the middle position.