how often..

[Cr Rider_Elliot]

Hi i have a '97 cr 125 how often do i have to get and engine rebuild and replace things like the top end?

 

[j.lawson]

do a search on this, it's been asked before.

But I always say it just depends, some people are still running on a several year old top end. Of course it's better to replace before it "blows" then after. I think your manual will tell you every 7.5 hours for piston and rings, reed valves. every 20 hours or so the connecting rod small end bearing.

 

[Kedoo]

if its not broken dont try to mend it, jus make sure not to run the motor on low oil.

 

[Race_Bennett]

if its not broken dont try to mend it, jus make sure not to run the motor on low oil.

that wont make a difference. He is riding a 2 stroke so the oil is in the gas.