Quote:
Originally Posted by Roscoe
I'd take the cylinder off and see if the crankshaft will turn (hold on to the timing chain) . If it won't make it all 360 degrees around it sounds like the piston might be hitting the crankshaft? Anyway if it turns OK, start putting it back together piece by piece checking that the crankshaft will keep turning as you go. Leave the spark plug out and keep the cylinder oiled to help things along. Are you using the starter or turning it by hand?
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As suggested, I took the cylinder off and tried turning the crankshaft. I could barely turn it by hand. I put a socket and ratchet on the outside of the variator. It will turn with some effort but the piston rod seems to be stuck. When I try to turn the crankshaft, the piston rod just smacks the top or bottom of the opening of the engine. Looks like I definitely have a bad crankshaft. I guess my next step is taking the engine completely off the scooter and replacing the crankshaft. This bites!