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), with the same weight and resulting torque.
An exception are the flywheels for Evolution Big Twins. They come as Torque Monster flywheels, i.e. unlike stock they feature a thicker left wheel for more lower end 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 JD/FD models 1921-1929
- Ø 8-3/4”
- stroke: 4 ”
- gross weight: 12.19 kg