1998 rm125 cylinder?

[mopower440]

On a 1998 rm 125, does it have the chrome or nikasil plated bore? If it does, what do you do when it needs to be bored out?
thanks

 

[hot125mod]

it is nikasil and usually you can only cut a plated cylinder .080 over. A cylinder that isn't sleeved will chip when you start grinding because of the nikasil or chrome. so be careful.

 

[mopower440]

so if it is in need of boring, i have to either re-sleeve it or buy a new cylinder?

 

[76GMC1500]

You can have it replated for <$200. If you can get a new cylinder for less, do that but replating is the way to go. Sleeving is acceptable, but introduces some new problems.

 

[2-Strokes 4-ever]

Had our RM125 sleeved without coating a LONG time ago. Never ran into issues, have done 8 pistons since, and have only bored .10 over. Woods ridden bike... (low rpm) and we do rings every 25 hours.... piston every 50.