RE: GMS .47 is there a better motor ?
Keep in mind that the GMS has head shims to adjust the compression. It comes from the factory set up for easy starting. Once broken in, the number of head shims can be reduced to improve compression and performance. I have not tried it, since the performance from mine is already so good. However, it would be interesting to see what the compression would increase to if the shims were taken out. Has anyone tried this???