Ideal crusing rpm

[Rhompin45]

That's a good question. I would think it would be economical speed along with rpm. Because wind pushing against you at higher speeds decrease it also. But I would think leaving it stock and cruse below say 40 45 would be your best bet. But don't take my word as this is my best thought. Although running at said speed it would be nice to be in the lower end of the upper hp range if that makes sence ? It would be nice to see a dyno of one of these motors but even stock gy6 motors seem to vary some. So there is a lot of variables. I hope this somewhat makes sence.