Hopefully you guys can help my friend out!!! He has a 00'warrior with the ALBA pipe kit with the K&N filter, outerwear and jet! Stock main jet is 145 and they gave him a 147.5. So he put everything on and it ran like crap. When you give gas (pretty fast jerk) it stalls (hesitates too). So we up the needle to the 4th position and it runs better but not what it should be. Checked the spark plug and it is running lean! Need some help people!! All info is appreciated!! later

 

Giz400ex,
The main jet is toooooo small---The Dyno-jet jet kit comes with 3 jets up to 155, a different jet needle, a drll to open the lift hole and instructions---try it, much better calibration thru midrange!!
DOO800