I removed the fins from the flywheel. They serve no purpose since the engine is running so cool, and therefore only create unnecessary drag. I also set the ignition timing closer to TDC if not ATDC. The crankshft is tapered where the flywheel is bolted down. I removed the key stock that holds the flywheel in place and reinstalled the flywheel with the keyed notches off set half there normal postition.