Harley Davidson 40mm CV Carburetor Performance jet kit includes four main jets, jet holder, needle and three pilot jets this is the only kit you will need from mild to wild Fits the following Applications: MAKE | CARB | MAIN | PILOT | NEEDLE | HOLDER | ORDER | HARLEY | 40MM | #190 #195 #200 #205 | #45 #48 #50 | R420 | LO79 | STE0078 | CARBURETOR JETTING GUIDLINES Exhaust Only: Pilot One Size Large, Main One Size Larger Exhaust & Air Filter: Pilot One Size Larger, Main One or Two Size Larger Exhaust, Air Filter & Cam: Pilot One or Two Sizes Larger, Main Two or Three Sizes Larger Exhaust, Air Filter, Cam & head work: Pilot Two or Three Sizes Larger, Main Three Sizes Larger Note tube and needle should be used on all performance applications. Legal for Racing Vehicles only, NOT intended to be used for pollution Controled Street or Highway Vehicles |