Board index Flathead Power-Technical Questions, Answers, and Suggestions Big Twin Flatties Crank Torque settings

Crank Torque settings

Moderators: Curt!, Pa

Post Mon Mar 31, 2008 5:50 am

Posts: 11
Location: Suffolk,England
I have the following for my '42 Model U:
T&O flywheels
Jims crankpin
Jims sprocket shaft
Eastern pinion shaft

Any suggestions for torque settings to assemble this lot. S&S recommends the following for big-twin:
Big Twin
Sprocket 290-320
Pinion 140-170
Crankpin 180-210

Anyone used these with success?

Post Mon Mar 31, 2008 6:10 am

Posts: 636
Location: Wisconsin, USA
The spec for the sprocket shaft given is for a larger taper. 150 is plenty for your output shafts on absolutely clean dry tapers.

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