The new bolt-in performance upgrade motor that fits all Burromax TT250 and TT350R models. This 500 watt upgrade motor providings more torque and speed than the stock 250w/350w motors. This upgrade provides 500watt, 2500rpm of power which can produce speeds ranging 18-19 MPH and nearly 50% more pulling power. An excellent choice for Burromax, Razor and other brand Mini bikes that use 250W-350W 24 Volt motors. This is a direct replacement (plug and play) motor for the Burromax TT250 and TT350R models. Motor will work with both SLA and Lithium Ion Batteries.