I'm not sure, when I pedal it feels like its in bike mode and doesn't spin the front variator. I've replaced the starter clutch pads and springs, the contra spring. I tried adjusting the engine forward to see if tightening it might help; but it actually didn't. It has a new belt so that's not the problem. I'm not going to invest in the pulley unless its definitely going to help, I was just thinking about it because it will directly spin the variator.