Putting a motor on a different bike opens up a whole lot of variables, especially angles. Carburetor angles (fuel distribution), chain angles (tension), engine angles (torque). 5 out of the 5 engines I've owned required different settings. 4 of them on the same bike frame. I am on the fifth engine in 3 years. 1) 49cc, 2010, 2,500m 2) 66cc, 2011, 600m 3) 66cc, 2011, 2,000 4) 66cc, 2012, 570m 5)[NEW FRAME-STEEL] 66cc, 2013, 25...