Can I upgrade a 350 watt Sondors to the 750 watt motor? What parts would I need? May 04, 2020 16:35 I would recommend starting with this video: Related articles Can I charge my battery faster? 1,000 watt Sondors Motor Upgrade Will the RadPower Upgrade work on the RadRunner Ebike? Do you sell the wiring harness for RadPower Bikes? Is there an easier way to install the RadPower controller besides drilling and using nutserts? Comments 0 comments Please sign in to leave a comment.