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Allan-
I usually figure about a 70% loss between the flywheel and the rear wheels, so 200 at the flywheel sounds about right.
By the way, you can drill holes in the counterweights for the secondaries and get them to react faster. About 5/16" diameter holes are a good starting point.
The nice thing about these carbs is that they are easy to work on and easy to take apart without damaging gaskets and seals. Jet changes are really simple as well.
Fred
