Sure.

First you have to determine if you have a Series or Sepex system.

If series, you would need the throttle conversion kit. 48 volts electronic components kit, 4g cable set,HD F&R, and new batteries
All that costs right about $1700. You can run the stock motor on a series but if you have a sepex you will need another motor. That will cost around an extra $400-$800 depending on what you want.