QUOTE(liljhall09 @ May 13 2009, 07:49 PM)

I have an 04' Honda 450r that has a sparks big core exhaust , uni filter , and no air box lid. The quad is backfiring when i let off the gas. It has a 118 main and 52 pilot ! Will the sparks jet kit solve my problem ?
Thanks
the correct jetting will sole your problem.... but as for jetting specs... youll need to check with the members here... i have never worked with your combo.
my bike has the same mods + a hotcam stg 2.... i run a 185 main and HRC needle