Fred Brown's Norton Combat wins OC Vintage bike show

maaseyracer said:

What does a stock Commando dyno at? 45? 7hp on a dyno is massive.

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That’d be a good un I reckon.

This motor is far from standard though.

acadian said:

And this is why I'm asking, the short stroke Molnar crank is 1800 pounds, but the steel flywheel is 650 pounds, so I'm thinking of going that route with the longer JS rods

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IMHO that would be false economy in a race engine. You leave yourself exposed to a broken PTO … I know you can radius the shaft / cheek interface, but the things are 50+ years old now with unknown mileage and fatigue…