Hey guys. I bought a 2000 Scrambler 400 (2x4) and was told all it need was new rings. He told me it had been bored to an 85mm. When I took the top end off this is what i saw.
The first picture is the front of the piston (the side facing exhaust) The top left of the piston has a chip in it.
The second picture is of the left side.
The third is of the right side.
Does anyone have any idea on what happened?! The oil pump does not work. He didnt say if he pre-mixed or not. Also the cylinder looks like some of the piston is smeared on it. From all my research I think it is a combination of no oil and......either running too lean.......OR.....possibility maybe the piston was too big for the bore?!
Any help would be GREATLY appreciated.
The first picture is the front of the piston (the side facing exhaust) The top left of the piston has a chip in it.
The second picture is of the left side.
The third is of the right side.
Does anyone have any idea on what happened?! The oil pump does not work. He didnt say if he pre-mixed or not. Also the cylinder looks like some of the piston is smeared on it. From all my research I think it is a combination of no oil and......either running too lean.......OR.....possibility maybe the piston was too big for the bore?!
Any help would be GREATLY appreciated.
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