Losi 1/4 Promoto Mx Fxr 2S RTR Brushless Motorcycle Red is a ready-to-run Promoto-MX built for dirt tracks, grass, jumps, and motocross-style riding. It uses 2S brushless rear-wheel drive with the MS6X control system and a high-RPM stabilization flywheel and includes rider figure, rising-rate rear suspension, front disc-brake control, and selectable riding modes. Authentic leaning, counter-steering, and on-the-fly Dirt, Street, and Wheelie-control modes create convincing motorcycle handling. The Spektrum Smart brushless system works with a DX3PM transmitter and MS6X technology, coordinating steering, traction control, wheelie control, and the high-RPM flywheel for realistic two-wheel operation. Official dimensions: length 20.2" (513 mm), width 10.8" (274 mm), height 17.3" (439 mm). Battery: Required (sold separately). Charger: Required (sold separately). Recommended power package (sold separately): 7.4V 5000mAh 2S 100C Smart G2 Hardcase LiPo Battery: IC5 and LiPo balance charger rated for 2S with IC5 charge lead.