ARC Racing Billet Flywheel, Honda GX340/GX390
GX390 Adjustable Hub Flywheel The ARC Billet Flywheels are CNC machined from 6061 T-6 Aluminum. It weighs 5.40 lbs. The main feature of this design is the steel crankshaft hub that allows for timing changes at 2° increments. Hub comes set on the first negative mark, which is stock 24 deg timing. Designed for use with either an on-board electric starter or a handheld electric starter. No coil bracket is required, uses the stock coil. Keep in mind that this is not intended for use with the newer UT2 coils with the built-in 4500 RPM rev-limiter. You will need one of the previous coil versions that do not have the rev-limiter.
Torque to min 85 ft/lbs
Minimum coil gap .030
Will Not work with charging stator
Will Not work with OEM starter cup
Will work on Predator 420 and Vegas 460cc engines