Not honed on last top end = low comp?

[rm_racer]

Hey,
I had a 1994 RM125 (just sold it last week). I was sitting here lastnight and had a thought pop into my head. The bike had not been running for the last year due to low comp, which I did not know till about a month ago. What Im thinking is because I didnt hone the cylinder last time I did a topend (my friend talked me out of it.. I should have just got it done anyways), that the rings did not seat properly and it lost compression fast. There was only 6 hours on the topend before it quit on me.

It isnt really important now, but I was just wondering if anyone thinks this would be the problem, so I can help out the guy who bought it. Too bad I didnt think of it before I sold it.. ohwell cant go back now.

Thanks..

 

[DougRoost]

Could be part of the problem. Were there still crosshatch marks visible on the cylinder?

 

[rm_racer]

They were visable somewhat, but the cylinder didnt look like it was just honed. This is the kind of thing that makes you feel dumb lol, when I could have maybe fixed for probably 40$ and still have a bike instead of selling it for only 650. Ohwell.

 

[rmc_olderthandirt]

Did you check the end gap on the new ring before you installed it?

I would expect any problem from not honing the cylinder would be there from the first time you started the engine. I wouldn't expect it to cause the engine to quit after 6 hours.

Too tight of an end gap on the ring could have done that, however.

Rod

 

[Xtremesports445]

did you replace just the rings?

 

[76GMC1500]

I have absolutely no cross-hatching left in my cylinder. I replaced the rings and piston recently without honing. I have since put another 15+ hours on the motor and it still runs great. You don't really need to hone the 2-strokes.