The best thing I can say is to rev it more. You don't have the off-idle grunt of a Harley in a Speedmaster, so it can be a little 'jerky' if you just let out the clutch at 1000rpm. Try it at 2-2500rpm and it should be easier.
Steelheart- '03 Speedmaster Black/Yellow
The Hayabusa Killa
16" Shorties/140 mains/Airbox drilled
Procom CDI
"There is no cure for Celibacy. But we can treat the symptoms."