sideshowbob
Member
huge hill climb difference in 49cc verses 66cc
I found after getting a 68.5cc motor kit that there is a huge difference in hill climbing ability between 1hp and 2hp. My 49cc Grubee could not get out of its own way and I had to help pedal up hills 25 degree slope and forget the really steep ones. But my 66cc unit goes right up the same hills with power to spare on the same 40t sprocket I was running before. So any way you can get more HP will help you get up and over any hills. I want to add an expansion chamber next that should help even more. I've noticed that the 4 strokes are gutless from a dead stop and weigh a ton, the power to weight ratio on a 2 stroke is much better, but the 4 strokes can run all day with no cool off periods. Good luck with whatever you decide.
I found after getting a 68.5cc motor kit that there is a huge difference in hill climbing ability between 1hp and 2hp. My 49cc Grubee could not get out of its own way and I had to help pedal up hills 25 degree slope and forget the really steep ones. But my 66cc unit goes right up the same hills with power to spare on the same 40t sprocket I was running before. So any way you can get more HP will help you get up and over any hills. I want to add an expansion chamber next that should help even more. I've noticed that the 4 strokes are gutless from a dead stop and weigh a ton, the power to weight ratio on a 2 stroke is much better, but the 4 strokes can run all day with no cool off periods. Good luck with whatever you decide.