Originally Posted by RoninMoto
The cam shaft rotates 1 time for every 2 times the crank shaft rotates. So if you line up the cam shaft mark, it will always be TDC firing.
good point. Was thinking about the valve adjustment procedure of the 950's where you have to pull the cams out to get at the buckets. Forgot that the cam stay in place in the 690 motor...makes life a lot easier.