Go to the corner put your head down and have a ten minute time out. When you have stopped cursing just admit you need a new balancer and go get one. Your balancer should have, at the very least one line at TDC. Everything you are saying comes down to the balancer in my opinion. It is the number one overlooked replacement part that wears out in an unforeseeable manner. The rubber layer in the middle dries out over time and will allow the outer ring to slip. If you don’t believe me knotch a mark on both the inner and outer rings next time you are ready for a light show. After picking your carb up from the neighbours yard again go check the knotches. They won’t be lined up anymore. Once they slip they keep slipping, you might even be able to turn the outer ring by hand to prove the rubber is toast.
And remember, the balancer is not just there to provide you with timing marks, it is there to balance the rotating assembly.
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