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bruce71198 · July 22nd, 2013, 03:50 AM

Your engine is a two stroke if it takes an oil gasoline mixture. Two stroke engines intake the air fuel mixture differently than four stroke engines in that when the piston goes up in the cylinder the air fuel mixture is sucked into the crank case then when the piston moves down the pressure in the crankcase pushes the mixture through ports up into the cylinder. The oil in the gas lubricates the bearings on the crankshaft and connecting rod as well as the cylinder wall. In order to seal the crankcase so it can suck in the mixture and the pressurize it there are seals on the end of the crank. Due to the lack of oil in the mixture there is a good chance the bearings on the crankshaft are no good. If these bearings get sloppy the end seals won't seal and the crankcase won't suck and blow the air fuel mixture and you will have what you have now. I have come experience with these engines and off the top of my head your looking at about $250 in parts to do the job, labors free if you do it yourself. You will need a special puller to get the flywheel of other than that, standard tool are all you need. Good luck.

July 22nd, 2013, 03:50 AM	#11
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	Your engine is a two stroke if it takes an oil gasoline mixture. Two stroke engines intake the air fuel mixture differently than four stroke engines in that when the piston goes up in the cylinder the air fuel mixture is sucked into the crank case then when the piston moves down the pressure in the crankcase pushes the mixture through ports up into the cylinder. The oil in the gas lubricates the bearings on the crankshaft and connecting rod as well as the cylinder wall. In order to seal the crankcase so it can suck in the mixture and the pressurize it there are seals on the end of the crank. Due to the lack of oil in the mixture there is a good chance the bearings on the crankshaft are no good. If these bearings get sloppy the end seals won't seal and the crankcase won't suck and blow the air fuel mixture and you will have what you have now. I have come experience with these engines and off the top of my head your looking at about $250 in parts to do the job, labors free if you do it yourself. You will need a special puller to get the flywheel of other than that, standard tool are all you need. Good luck.