Does someone out there have a 400ex with a 415 kit? I am really thinking about getting one and I need to know how much it really helps! SandMan430 (over in the bomb site) told me that one was right with him in a drag race, and he has a built DS!

 

That stroker kit hauls!
I'd go with big bore as well and bring the displacement to 465cc
They run HARD!
Different power and hard to compare with my built Raptor...but I can't get away in the dirt
in the sand I still pull him

 

Ya you see thow, I don't want to run race gas.

 

Race gas is determined by compresion ratio and cam selection
with the 465 you can run pump gas with stock ignition box and stock timing...however a little octane never hurt anyone