shorty's400ex
12-03-2002, 06:30 PM
I have a 99 400ex with a small bore job with wiseco piston.
i am running a whitebros R4 exhaust with stock jetting.
this is what was advised but does anyone have the same pipe with some jet sizes that i can start with? also have twinair air filter with vented air box lid. how much would i notice a difference if i installed a xr400 cam? is a cam necesary if i go with a little bigger bore?
i am running a whitebros R4 exhaust with stock jetting.
this is what was advised but does anyone have the same pipe with some jet sizes that i can start with? also have twinair air filter with vented air box lid. how much would i notice a difference if i installed a xr400 cam? is a cam necesary if i go with a little bigger bore?