Hey there, Alberta!
Are you starting with zero throttle in first gear, just letting the clutch out? Or are you applying throttle as you feather out the clutch?
I ask that because I have noticed over the years if I try to pull out of a dead stop (like in my parking garage) with zero throttle, there is a bit of shake. But, frankly, not nearly as much as a Harley.
Once I swapped out the clutch cable for the Barnett aftermarket (waaaay easier to pull) it got smoother, particularly when revving the engine somewhat.