Quote:
Originally Posted by The_big_dill
I have always thought of a replacement engine as a back up option, but i think i would rather do a rebuild with a new chain and sprockets.
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The cam sprockets and chain are identical to the pregen. So you can probably buy a new set of cams on ebay pretty cheap. Then a new chain from the dealer. The cams are a little different, but I think the new ones are just ground better.
Still, you have to wonder just why your chain stretched. If it stretched.
When you start into it this winter, pull off the clutch cover and see if the chain guard is still around the chain where it goes around the crankshaft. If its not there, it means that at some point, someone overtorqued the rockers and destroyed the engine. Part of the problem is that it stretches the cam chain and breaks that guide off. Another thing is that without the guide there, the cam chain is going to be a little floppy.
The good thing is that it also means that you wont have to split the engine to change the cam chain if the guide isn't there.