If you plan to continue using the roto-start system I would suggest picking up a spare one-way bearing.
There are two things that can happen to a one-way bearing. It can slip, which would cause the engine to not spin when trying to start it. Slipping is most often caused by gunk in the bearing itself. Often simply cleaning the bearing will get it working again.
Or it can lock-up (very uncommon), and cause the drive gear at the rear of the engine to rotate even after removing the starter "wand". In the event that the bearing locks up, continuing to run the engine will cause excessive wear at the backplate bushing.
A starter box could be used even if the roto system is still installed on the engine..
Last edited by motomatt; 10-25-2010 at 06:29 PM.