top end rebuild

[mpleger76]

sorry i have so many questions!! I finially got my cylinder back from the machinist with my new .30 over wiseco piston. this is my first time rebuilding any motor parts on a atv. i noticed the directions said something about drilling lubrication holes on 2 cycle engines that have a exhaust bridge. does this aply to me? exhaust bridge? i plan on tourqing the head down to 18 ft pounds, what about the base? i guess im a little nervous i spent a few bucks on the blaster the last couple weeks and want things to go good. i put on a tors elim kit with idle screw and rebuilt my stock carb, fmf pipe and silencer, boyseen reeds i cut a 3 inch by 6.5 inch hole in my airbox and fit it with a outerwear, not to mention i just put douglass .190 alum rims with kenda tires on, all this month. would like any good advise.. thinking of starting my jetting at 300 main and working my way down. thanks

 

[roadkill]

idk that might be too rich try around a 280 and do a plug chop and go from there

 

[Awk08]

no, the drillin holes part does not apply to blasters
i'd do the head nuts to 20 ft. lbs. and the base nuts to 25 ft. lbs., and make sure to retorque them after complete cool down after the last heat cycle, a leakdown test is also recommended to check for airleaks too, holeshot sells them on here if ya need one
and you state you opened up the airbox some???? ya better bump that main jet up 1 or 2 sizes to compensate for the extra airflow
search, read, re-read how to do "plug chops"

 

[mpleger76]

Thanks for the advise. i better quit being such a sissy and start putting this old beast back together!!

 

[tyler1blaster]

i think a 280 main jet would be perfect. and these are easy to rebuild. you should have no problem

 

[fioz600r]

Make sure you read the thread on proper break in proceder also for your new topend!!!!!!!!!

 

[mpleger76]

Thanks to bf and all the blasterheads out there i'm finially building my own machine and having a blast!! i just painted my jug with some hitemp black puttin it back together tomorrow eve.. thanks again all!!!

 

[super noober]

we demand pics!! lol

 

[mpleger76]

i will be posting them soon! oh yeah white fenders & black hood n tank cover too!!

 

[OConnor Racing]

This will get you in the ball park.

http://www.kenoconnorracing.com/Two Stroke Top End Rebuilds.html

 

[scotj77]

I would have to say that skipping the leakdown test could turn out to be one of the worst steps to skip. They are pretty easy to build. you can look it up on the do it yourself page. they only thing I am having trouble finding is a pressure guage that reads low pressure accurately. best of luck to ya