Rm 85

[GYOGI65]

MU daughters rm85 quit running thought piston and rings (low compression) tore apart and found 1/8 to 3/16 play at crank bearing .can any one tell me if possibl to do at home or do i need a specialty shop to do . I have spent the last 25 years working heavy equiptment but my sons 400 ex keeps kicking my back side

[underpowered]

2 strokes are simple, if you get a service manual you should be able to do it easily. a 2-stroke simpler to work on than a 4-stroke. nothin to them. if you are moderately mechanically inclined you should be able to do it without any problems.

[bradley300]

sounds like you need to split the cases and change the crank bearing. go buy a clymer manula and you should be able to handle the job by yourself