which jets are recommended for kfx 700 with k&n air filter, no box mods, and yoshimura dual exhaust. i ride in louisiana at low altitudes. also how should i set the needle and should i adjust the air mix screw
thanks

 

I would start with 142 front and 145 rear,the air screw- turn it out 1/4 at time with the engine warm tell it stops backfiring when you let out of it.This would be a good starting point.

 

I had a Yoshi pipe on my Vforce. I had dyno'd many times to get it perfect. DO NOT use typical front and rear jet size increase. You will loose horsepower. Because of the crossover pipe(a good thing), the front tends to run leaner. This may sound odd, but run one size larger in the FRONT. 142F/140R is what I ended up with. I'm at 600ft elevation. Temperature during the dyno run was 81 degrees. Just remove the snorkel to gain an easy 2 HP. Do not shim the needles unless you plan on using the DG snorkel. I have dyno runs to back up what I say. Let me know how it works out for you.