Discussion in 'YZF R125 General Discussions' started by Mark wheeler v008, Jun 4, 2017.
I have fitted a new piston and rings but still have a little smoke is this normal ??
If it's burning oil then it could well be worn valve guides or stems, the piston and rings have been changed so the only other point of entry for oil would be the valves. If the engine has ever run low on oil which is easily done as these engines only use 1 ltr, then i'd imagine the head would be the first to be starved. The engine could also be running rich of course. Is the spark plug or exhaust sooted up?.
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