Who makes sprockets for BST wheels on a 2010 muscle? Btw it is a chain drive. The bike has a ton of work and money spent on it but all the work has raised the rpm at which the power comes in. I bought a smaller sprocket for the front from Vreelands and frankly after cams and larger valves and porting the lost torque is noticible at the eighth mile track I frequent. I did buy the bike this way. Frankly, I believe some increase in cc may be the only way to get back the lost bottom end.