Re: rear suspension #2
I have found shudder on take of with a cent clutch to be too high a ratio. Whats the ratio?
I have a dual pull brake made by Sunlite. The initial set up is critical. It pulls differentially. one begins before the other. I guess maybe to bias the rear brake first(depends on where you put the cables). Play around with it a bit. Mine worked pretty well on the 49cc shifter which topped around 35. If you want massive pull use the M/C handles.
One would make a great clutch handle also. I used a clamp used to hold 1/2" water pipe to make a fixture to hold the clutch disengaged. Might work for you.
Sorry about the pic but you get the idea.