I installed a White Brothers E2 exhaust, and a k&n filter. It pops some when you first hit it. How do i know what jets to put in it?

 

Do yourself a favor,,,get yourself a Dyno-Jet Stage 2 kit, and follow the directions. I have an 01 Rappy, piped and jetted, and with the air box mods that DynoJet recommends. The thing is a rocket,,,,,,. I tried trial and error on the jetting for weeks,,,,musta had the carbs off a dozen times. A lot of people dont like the kit,,but it worked like a champ for me. Havent laid a wrench on it since.
Bosch

 

Can you ket that kit anywhere?

 

Any Yamaha dealer can order it for ya,,or you can order it yourself at www.dynojet.com.

 

Thank you for the help. I'll give it a try.

 

I've got a similar setup, 01 Raptor with the E2 and the K&N. I'm using the Pro Design adaptor so my airbox lid is off. I'm running 25 pilots, with 165/160 mains. Runs great and the jets cost $3-$4 each. Makes a huge difference in low to mid range, I can lug the track in 3rd without any problem. Good luck.

 

I recommend you copy bluebloods set up. Dynojet kit is a waste of money...IMO. Use that money to buy the K&N Pro set up and run without the lid.