Yep, us southern Ohio rednecks are at it again
4° timing advance flywheel key from Henner Motorsports. It's well worth the money, but dont think the install will be easy. The flywheel doesn't want to come off and we eventually had to wrap a ratchet strap around the legs of the puller. And you'll be disheartened because the original key fits so tight, and the offset key fits even tighter, but it does work. You're best off to start the key fitment and then let your half inch impact seat it when installing the flywheel
Results: amazing throttle response, powers thru every gear much faster, and added another 5mph to 4th gear. Even changed the exhaust note.
Cons: it's harder to kickstart, and will kick back about about 1 out 4 tries.
Opinion: Run, dont walk to your computer/phone to order this!
I can't claim this was my idea because my good friend Jerry already did It to a CB, but I think im the first with a CG.