jetted my raptor w/yoshi comp exhaust using 146/148 jets out of dynojet kit (didnt think much of it, just followed dynojet instructions) and it runs great....

however, the yoshi exhaust wants 150/155 jets....woops

before i go out and buy some larger jets, what am I missing out on? advantages/disadvantages of using smaller jets? +/- of increasing jet sizes?

thanx, I truly am a noob, but i installed the jetkit in under 2 hours which made me real happy and it ran like a kitten



have pro design kit w/kn filter and ehs lid w/yoshi comp exhaust installed

 

Better pull your spark plug and see what color it is. You are probaly running lean, and that can cost you a motor. So you should pull the plug and if it's white, jet up to the spec's Yoshi calls for.

 

Dynojet numbers are different than Mikuni (stock). 146/148 is right for DJ jets and needles, 150/155 is right for Mikuni jets and needles. Do not mix up DJ and Mikuni needles/jets, you'll never get it to run right. Changing jets on the stock Raptor carbs is not as easy as it sounds, congratulations on your successful wrenching!

 

so does that mean that by installing the complete dynojet kit (including the needles) I am good to go at 146/148?