jetting after mopds

[christopher43]

when the head gets back from RHC i will have ssvalves & springs,ported head and the 04 piston(on a 02) with hotcams stage 1 cam and a PC T4 exhaust .anyone else running same mods give some jetting advice? elevation 350 feet

[therapture]

I don't have all those mods yet on the 250F...but generally with a ported head that flows more, you are going to need to run LEANER main jets and/or needle settings. The reason being the stronger signal across the main jet tower will pull MORE fuel than the stock engine.

RHC can give you some good ideas where to start.... ?

EDIT: on my 450F I had the RHC full race porting, his 208 grind camshaft, opened up airbox, and CHM SM1 pipe along with a higher compression Wiseco piston...

I was running as lean as a 152 main in the hot weather, going to a 155 in the cooler weather...