How often do you rebuild a 2 stroke?

[dirt_rider123]

hey guys and gals i was thinking about getting a 2003 kx125. i'll be riding it almost every day in the spring,summer, and fall. it'll be mostly woods riding but i'll be going to the track about once a week. how often do you think i'll have 2 rebuild it? thanx!

 

[84cr125]

usualyy a compression test can tell you. but its best to do it every 70 hours
even if it doesnt really need one mico cracks develop over time and eventually they grow and can lead to catastrophic engine damage.

 

[Octane250F]

With a 125 you will probably be needing to rebuild it more like every 50 hours. Once you get used to the bike you should be able to tell that the power just isnt as snappy as it should be, but its still a good idea to do a compression test every now and then just to be sure.

 

[sixds]

and a rebuild is pistons and rings? or just rings?

 

[84cr125]

A rebuild consists of: piston and rings,

You could also consider: cylinder hone, top end bearing, piston pin, and c-clips

 

[95xr250]

You need to at least every year. And the 50 hours depends on how hard you are on it. You should rebuild ever 50 hours or motorcross type riding. But if you ain't always actin like your in a race and mix 32:1 you should only need to rebuild ever year.

 

[mmz77]

A rebuild consists of: piston and rings

Not always... Could just be rings

 

[84cr125]

for 50hrs of motocross, you should invest in a piston aswell not just rings.

 

[dirt_rider123]

ok thanks guys.does ne one know of any oil you would recomend to mix with the gas that isn't too expensive that would still work good? thanks!

 

[84cr125]

i use lucuz 2 stroke racing oil at 32:1 and it runs good

A little spooge but i need to repack my silencer anyways.

 

[dirt_rider123]

ok sounds good. thanks a lot 4 ur guys' help. i might get the kx125. do you guys think $2200 for a 2003 kx125 is a good deal. its in really good condition and i can get them down lower since i'll be paying straight cash.