Ryan300exRider
02-16-2003, 02:26 PM
I just got my Sparks x-4 system for my 300ex and i have a question. I have a fully open airbox with k&n airfilter and now the full system....When i called sparks to order it the guy said that all i need to run is a new 152 main jet and nothing else....My question is do i need to buy a new pilot jet or move the needle up because i dont wanna lose preformance ????????