My guess on jetting

[QuadZ250]

Tell me if I'm thinking correctly or way off!
The mods:
Stock expansion chamber
FMF power core 2
.60 over
Performance Namura piston
Boysen fiber reeds
K&N filter
No lid

I've been researching and I think I may be a little low I put in a 270 main jet and a stock pilot! It runs great but I don't want it lean! Any help? Thanks!

 

[Awk08]

270 is prolly close for winter 20/30/40's degree weather
for summer you prolly only needed a 250 for just the k&n and open airbox, it usually takes at least an fmf head pipe to need a 270
but do a proper wot plug chop to be sure

or as long as you like how it runs, and not fouling plugs, it'll be fine, prolly a size or so rich. IMO

 

[QuadZ250]

Thanks AWK! Just what I was thinking! P.s. Please pm me about a GSXR brake setup! I want one!

 

[Awk08]

pm sending .