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Round two of sorting a rough motor.


The crank pulley is keyed into the crankshaft so there is only one correct orientation


When the crank pulley TDC notch lines up with the casting stub on the lower timing case the TDC notch on the cam sprocket should also line up with the oil spray tube over the valve assembly - correct?


My cam notch is past TDC when the crank pulley notch is at TDC.  This also means the rotor is well past plug lead #1 so firing as exhaust is opening?




If this is the problem - and I think it is - then remove chain tension plug and lift chain off the cam sprocket and turn it back to TDC.  Is this possible without taking off the upper timing cover?


Sometimes I amaze myself - the things I do.



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It depends what pulley you have. The pulley I'm working with now does not have a static mark. It has a dynamic mark. The woodruff key in the crank when up has the crank at TDC. The mark in the cam is a static mark for TDC which as you stated should be directly on top under the oiler. If you are off, slacking the tensioner is not going to give you enough to work with. You can take the cam gear off and move the crank to TDC, then readjust the cam gear the teeth you need to realign the gear to mate with the cam. Try not to drop the chain, a real hassle to if it binds up a link at the crank sprocket.

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the marks on my pully mean absolutely nothing, so i wouldn't put a lot of faith in your. use the marks on the flywheel to get the crank in the right position. then confirm the cam mark lines up with the spray bar. if it doesn't give it one full turn, and it should (2 crank revolutions to 1 cam revolution)

Edited by Zorac
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