rebuilding YZ250

[yz250]

How often do you think I will have to rebuild my YZ250 If I ride it almost everyday for a few hours.

[4x4kingx889]

no i bet some kid with a 4 stroke told u that

[MX86]

depends on how well you miantain it, how long you let it warm up, which oils and what ratio you mix at. how often you change tranny fluid, how well you keep up on the fluids, what your riding style is like. and just how clean you keep it.

average life span can be from 60 hours to lifetime you own the bike.

my advice is rebuild it when the compression drops around or to 120 psi..

and when your rebuild it it's not a bad idea to replace seals, and bearings...

[MX86]

Originally Posted by 4x4kingx889

no i bet some kid with a 4 stroke told u that

LOL re-read his post. he's asking if he rides his bike FOR a few hours a day how long can he go without rebuilding. not a few hours between rebuilds lol

[showtime257]

speaking of yz 250s my tri z 250 3 wheeler just blew up the piston just completly split in half man it was runni so good that day acorse its the stock piston from 85 ha ha

[4x4kingx889]

my buddy with a cr 250 went over 2 and a half years before his blew up....and it ran liked a rape ape the whole time

[yz250]

I also heard that before a bike blows up it runs really good. Is this true??

[rm250dude]

Originally Posted by yz250

I also heard that before a bike blows up it runs really good. Is this true??

well before my friends 95 yz 80 blew up he had to run it with the spark plug loose or it would flood out and we always had to run start it and it had no low end power whatsoever but once u hit the powerband it fuckin ripped and u could run it at peak revs all day long and beat the shit out of it but after he rebuilt it....it kind of seemed more timid idk maybe it was jus me

[4x4kingx889]

i dont see how it would run better idk.....

[86 Quad R]

as a rule of thumb i generally ckeck the compression after a breakin and note it. afterwards i routinely check the compression and if it falls below about 10-15% of what it was originally, i tear into it.