Quote:
Originally Posted by Gaz64
A pro uses the positive stop method via the spark plug hole to find true TDC, then mathematically marks the balancer from 10 - 50 degrees BTDC.
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Not just pros, even talented amateurs.

And you don't have to rotate the engine backwards either. The whole process is a 15 minute job. Click here:
How big an issue are slipping balancers?