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Post by captjeff01 on Nov 18, 2019 11:13:31 GMT -5
2008 Chinese gy6 150 at idle warming up, made a pop sound and dies, spins over very easily , upon further investigation I remove valve cover and no timing chain in sight !!!! Any suggestions ?
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Post by GrumpyUnk on Nov 18, 2019 11:44:42 GMT -5
As far as I know, there is no way to replace the timing chain except by splitting the engine case. The chain rides on a sprocket that is on the output end of the crankshaft, just inside the case, so it would have to be routed around the crankshaft and guided up the opening towards where the cam will be upon full assembly. IOW, it has to go around one end or the other of the crankshaft to get 'under' the sprocket. Both ends are 'through' their respective sides of the case, so the case must be split. If there is a trick way around that, I wish someone would make it known. If you consider a machine that is near 11 years old, it may be time for some refresh work, such as rings, etc. You don't state the mileage, so it could be a lot. One last shot would be to fish down the timing chain area and see if you can grab the chain with a magnet or some coathanger wire formed into a hook. If you fish up an intact chain, buy several lottery tickets quickly. If you cannot fish up the chain, or a magnet comes up with a broken chain, the above applies. It is possible a worn or sloppy chain could come off the side of the cam sprocket. If the chain tensioner mechanism was jammed, or the guides worn sufficiently, the chain *could* slip off and fall to the bottom of the crankcase, especially if it was installed a bit loosely. Go fish. tom
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Post by captjeff01 on Nov 18, 2019 11:56:40 GMT -5
Thanks for the response, I'm feeling bad about this, never heard of this issue, showing only 2800 km but the guy I bought it from said it was out of time, I found it had a faulty coil, replaced and have ridden it about 100 miles with it running great unroll this morning !!
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