Whatever you do, just get that stock piston out soon.

 

i dont wanna send out the head to have it ported and a new piston untill snowmobile season starts.
how long would it take hpd to trail port my 400?

 

Not sure how busy things are now, best to give them a call.

 

I just had a trail port and carb bore done by HPD for my cousin. It took around 2 to 3 weeks.

 

you would better to get a good pipe as HPD first,then remove that crappy airbox,the pipe and reeds thing is the best bang for the bucks along the right clutch kit,once that is done the stock pistons will suffer bad...
wiseco is a must have on piped engine on those,they run a lot smoother and better power output as well.the head mods is great when you got a good porting to match the new octane level motor,or if you want a really safe mod before winter and no tuning to do,you can get a new lighten flywheel wich improve response and rev's up.

 

PM Bubba297 he does great port work, he reasonable and usually has good turn around time.

 

that s a good idea

 

Why not cut and re-chamber your stock head?I run 15.5:1 comp on a stock head with a girdle kit.

 

with that compression i would have to run race fuel right?,i dont wanna run race fuel..

 

Yeah I run race fuel,but I have heard of better results from a chambered and cut stock head vs a billet.Just wanted to let you know what you could do with it safely,plus it's cheaper.