i have a 1985 honda trx 125 the head has been re built and new gaskets every thuing is to spects when started its ok but once oil statrts flowing at idle or load i smokes like a frate traim what could it be . before it was tore down it didnt smoke and the cylinder was never removed so i know rings are good they was replaced 2 yrs ago

 

it could still be the rings, 2 years is a long time if you ride alot.

 

I just had to do the rings on my Foreman not too long ago, and by what your discribing it could be the problem. Yet; you could check your valve guides maybe something got out of place?

 

ok i have replaced rings and still same thing i check value gages it all fine now in my gasket kit there was u small black o rings i didnt see where they go didnt see them the very first time i tore it apart