Cubshee421

So 18mm 1.0 die to clean up threads

Does anyone know the thread pitch on the shaft the front sprocket goes on? Nut fell off and the chain hit threads a bit.

I had someone measure my cubs and they said the port timing were factory. So it runs pretty hard but is just cleaning them up going to help that much. Or should I have someone bump the exhaust transfers up for me?

Still have this

Thank for giving me a honest answer. Im just local river racing we tape off 300ft

300 ft drags at sea level

What cc domes are people running on there 421 cubs on race gas

Idk how to post pic I can text them to someone

I have a 421 cub on 100LL the main and pilot are dailed. 160/48 The issue is if you rev it once its fine but if you rev it again it makes a bogging sound out of carbs. 39. Pwks DGH neddle in the middle. Do CEL wirk good on cubs. Shearer sb/oof

Should be fine 100LL @7degree timing drag race only

.015 base not sure about squish

Sea level

18 cc domes on a 421 cub I get 180 psi. Does this sound about right?

I need to be able to run this bike at least 10 passes back to back. We just grudge race but I cant just run 1 or 2 passes. Timing back to 4 and some bigger maisn where installed now I just need some test hits.

At 165 mains the plugs where black and wet going to start there.