Can you get the engine farther to the left? The chain guard should be right up against the seat strut. Trim some off the chain guard if you can. From the chain to the edge of the chain guard it could be 1/2″ minimum. With 1-3/4″ offset, how do you get the sprocket far enough to the right?
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience