KDXRIDER.NET

KDX250SR Jetting with FMF Fat pipe and DEP tail pipe
have had bike for 4 years in shed bought as runner blown crank seals
just had piston blow found out was fitted with 145 main jet WTF
standard is 165 I think as only have the manual for the non SR model

Has any one got the sizes for standard and how much difference for the fat pipe ??
thanks john

I don't know about the SR model, but the standard model came stock with 45/165 jets. 145 seems pretty lean. I run a 152 in my KDX250. The stock jets are very rich so most people don't keep them in long, unless they like changing plugs every 30 min.

Again, I only have info on the standard KDX250. But, when I put my FMF pipe on, I had to drop from 158 to 152 on the main.