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I had another look at this and get the bevel dot positions (see attachment) in relation to one another when turning the crank ( crank anticlockwise - cams clockwise). All upper bevel dots moving in parallel. Just another clarification of what I have and I have to assume you are correct (unless anyon...

That's a great article for those who want the best power and smoothness from their engine. I just need mine to run when I crank it over, otherwise the bike is just an expensive ornament. I am pretty sure that the timing is corrrect but I would like to be 100% confident before I pull the carbs off ag...

Thanks again, Gardner.
When turning the engine, I notice that the front inlet valve begins to open appr. 90º before the rear cylinder is at its firing point. Would this be correct?
(I struggle to understand the firing order between the two cylinders).
jp1

Thanks, Gardner, I just need somethimg clarified. I have studied the details of the cam gear ratios but it just leaves me confused. These details are all fixed and the only problem I have is knowing whether I have put the front cylinder head on correctly. (could be any of four camshaft positions whe...

Great to see the forum back - could have been gone for good!
Added my rough diagram of what I have and hope that it is correct.

Can anyone clarify this for me, please? I am currently restoring a 900SS and can't get it to start. The engine was refurbished many years ago and I have recently rebuilt the bike. I don't know what the problem is (carburation, electrics or whatever) but I decided to make sure that the machanicals we...