ARC's New Clone Flywheel 1.75 LBS Stock Diameter, Lightest Flywheel Available, Designed to use Factory Fins from Stock Flywheel. This flywheel is made from same quality materials and with the same attention to detail and reliability that has come to be expected from ARC. For optimum performance we recommend running with a balanced rotating assembly. You will need to put a few washers between the coil and the engine to center the coil over the magnet. Set coil gap at least .030" NOT LEGAL FOR AKRA's BOX STOCK OR BP CLASSES! Now featuring 8 degrees timing advance built into the keyway. 32 degrees BTDC.