Put the #41 chain on my bike as was suggested by others, adjusted the tensioner.. and went for a test run... 10 MPH, let the clutch out, gave it some gas... nothing.. changed choke position and... nothing.. then realised the petcock was still off.. tried it again to get a few pops and cracks.. changed position of choke, and it ran, opened the choke and took off... running great.. I'll have pics tomorrow of the whole setup, and my bolt- on version of 2door's tensioner