Stingray chopper/trike build

[Dave L.]

Could somebody pointne in the right direction........
I'm trying to find a 3/4" shaft centrifugal clutch with 420 chain sprocket on clutch, also what would you recommend for the we use sprocket on drive shaft, and where is best please to get these

 

[Chainlube]

41, 40, 420 (puff) chain all have the same pitch. What is the OD on the axle?