honda cl77 305 scrambler ignition timing problem

[Tim Miller]

The rotor should be at "T" when the cam is at 12:00 or 6;00. Not at "F".

Tim

Davo and Lee, Thanks for the suggestions. With rotor on F the line on the cam lines up at 9:00 or 3:00. With the rotor on LF the line on the cam lines up at 12:00 or 6:00. I suspect that something must be off in the alignment of the cam sprocket. I am surprised that it fires at all and that the piston is not hitting the valves. I was hoping against hope that I would not have to pull the engine. Thanks, Tony

[Tony1257]

Tim, Thanks for the info. When the rotor is at the "T" the cam line is at 9:00 or 3:00. I guess the solution is the same unfortunately pull the engine and top end. Thanks, Tony

[Hahnda]

With the Scrambler you can pull the top cover without taking the engine out. From there you can have a better look to see what's up. You can then check the timing marks.

[Tony1257]

Kevin, Thanks for the advice. I will try that first. Tony