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Leon Rennebaum · 10-05-2011, 10:13 AM

All one piece rear seal cranks are externally balanced at the rear - the round flywheel mounting flange, that the one piece seal must slipover and seal on, prevents the counterbalance from being part of the flange itself. Therefore, the counterbalance must be placed on the flywheel (unless the crank is specially balanced aka Mallory Metal). The front of the crank is internally balanced like any two piece rear seal crank.

10-05-2011, 10:13 AM	#3
Leon Rennebaum Junior Member Join Date: Oct 2008 Location: Williamstown, NJ Posts: 30 Likes: 2 Liked 0 Times in 0 Posts	Re: 305 balance job All one piece rear seal cranks are externally balanced at the rear - the round flywheel mounting flange, that the one piece seal must slipover and seal on, prevents the counterbalance from being part of the flange itself. Therefore, the counterbalance must be placed on the flywheel (unless the crank is specially balanced aka Mallory Metal). The front of the crank is internally balanced like any two piece rear seal crank.