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Remove head and check piston rings, piston for scoring, scratches etc... if its got chew-like marks its your small end bearing. Check barrel for...
Could be a multitude of things: Small hole/crack, blown gasket, or no gasket and the exhaust sealant has worn away etc...
I'm not to sure check your manual. But you'll need to replace your seals...
I actually ordered genuine yamaha rings, and they were twice as thick as these ones, also the piston went in very easily the first time, never a...
Hi, hopefully this forum will give me some answers! My YN50 is due for an M.O.T very soon, so I had to do some work, one of which was changing...
