[Christ]

Since the starter motor will overheat quickly, P&G will be mandatory in this case.

A pulse at full potential (what the starter motor was designed to do) will accelerate very quickly - and take much less than 10 seconds to reach it's maximum speed.

Assuming a 10 speed bike, you could "pulse" in high gear, reaching a very high speed quite quickly, then "bleed off" slowly, using your own light pedaling in whatever gear will help you maintain the speed for the longest time before pulsing again.

I'm afraid that using a normal car's starter will require something like this, as they heat up VERY quickly, and the resin that holds the coils together will melt, not to mention the magnets on the armature will crack - quickly.

My Uncle Jimmy used to rebuild starters and alternators, of all shapes and sizes, and I used to help him on weekends.