Welcome to Bullfrog Motosport!
6607-GX3 This is a 5-3/4" Diameter, Finless Flywheel for drag racing the GX 340/390. Will not work with the OEM pull rope or electric start. Must use a remote handheld starter #5955-12.Use the OEM non-UT2 Coil with the required #5980 Bracket(sold separately see below).
2.9 lbs. Minimum coil gap .030" Torque to 65 ft/lbs