HPI Roto-Start engine starting system is a hand held shaft driven starter. Replaces pull starter with a durable metal gear and plastic backplate. Starting is as simple as pressing a button. This product includes one Roto-start handheld starter. One Backplate starter unit. One starter shaft. One 32T spur gear,for mounting to one-way bearing. One 11T pinion gear/drive cup. Six 2.6mm x 10mm Hex Head machine screws. One 2mm L-shaped allen wrench. One instruction sheet. One exploded view/parts list.

7.2v 6-cell flat NiCD or NiMH battery pack w/standard connector(TAM). Battery Charger, if needed. Some disassembly of the vehicle & engine required.