Worn flywheels are a major obstacle during the rebuild of an engine, mostly with big expenses required to put them back into service. In such a case it is often more economic and safer to go for a new set. The Truett & Osborn flywheels offered here are manufactured from 80-55-06 ductile iron blanks, which are then heat treated. The 80,000 pound tensile strength blanks undergo an exacting 20-step manufacturing process, utilizing both CNC and conventional precision milling and machining. This insures accurate surfaces, legendary reliability, and excellent „truability“, an absolute necessity when setting up high performance motors to blueprint specifications.
They are made just like the stock counterparts, i.e. the left wheel is thicker than the right one (exc. JD and 45”), with the same weight and resulting torque.
All versions are unbalanced and require adaption to the respective lower end components. All T&O flywheels feature pre-installed and replaceable connecting rod thrust washers, providing increased service-life and restorability.
- fits Knucklehead 1936-1940
- 61”/1000 cc
- Ø 8-1/8”
- stroke: 3-1/2 ”
- replaces Harley-Davidson part number 338-36, and 339-36
- NOTE: Must be assembled with 1941→ 74” OHV crank pin
- gross weight: 12.76 kg
Cannonball Knucklehead Crankcases
Cannonball Panhead Crankcases
Cannonball Big Twin Flathead Crankcases
Jims Crankshaft Truing Tools
IC Flywheel Assembly Jigs
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: email@example.com