When you need to, if you seize it or notice low compression, its time for a rebuild, otherwise ride and enjoy it. When I raced, I would usually get a whole season out of an engine, but that was abusing it for a whole year.
top speed of a yz125 in mph
the yz125 would win has more top end power and pull
Depends. If you are rebuilding the bottom end . Wiesco has a bottom end rebuild kit . I dont know how much . But if you are rebuilding just the top end . You can find top end rebuild kits for pretty low . About 90 dollars.
with stock up to 85mph
1000
64 mph and the piston is so weak
Rebuilding an ATV top end takes some knowledge of engines. Check out my bio page for help.
get a clymer manual for torque specifications.
No,it's low on oil because its burning it. You need a top end rebuild
no.
depends on if your doing the top or bottom end. TOP END: about 200 bucks if you do it yourself about 400 to have it done BOTTOM END: about 350 do it yourself about 450 have it done. email me with any questions peewadin@aol.com