This is the Roto Start Electric Start System for the HPI .21 Savage series. **Will not work with the Savage SS .28 series.** **Use HPIP7126 for the Savage SS .28 series.** FEATURES: Replaces pull starter with hand held shaft driven starter, just press button to start engine Tough metal gears INCLUDES: One Roto Start Electric Start System for the HPI Savage 21 with steel starting shaft, gear drive for engine, hex wrenches, hardware to install gear drive, illustrated instructions REQUIRES: 6 cell 7.2V flat battery pack (DTXC2010) and charger (DTXP4190) Removing pull starter and installing gear drive on engine"s one-way bearing COMMENTS: This system does not heat the glow plug, a glow starter is still required. If One-Way bearing is needed, order HPIG1430 jxs 10/21/03 ir/jxs updt jxs 11/16/04 updt jxs 7/12/05