I just got my bike up and running! I'm very pleased (new build)! 48cc 2 stroke on an old cruiser frame - a 1985 Murray.
As I ran it up and down the road, I noticed that it lurches a bit. The engine runs smoothly without a load (clutch disengaged); however, under load (clutch engaged), it tends to lurch or buck. I'm pretty sure that it is the drive train. In fact, I tightened the chain a wee bit which helped, but it continues to do it. Any thoughts given my very brief description?
By the way, I used Norman's approach to sealing the intake manifold and it works like a charm! Thanks Norm!