: Retailers like Toytooth and Sears offer multi-packs that include battery clips, mounting brackets, and assorted plastic gears. Robotics & Precise Motion

N20 DC Gear Motor With All Metal Gearbox And Magnetic Hall Encoder For High Precision Reduction Includes L Shaped 6 Pin Connector Rugged Durable Motor VXB.com Bearings Go to product viewer dialog for this item.

For DIY electric vehicle projects like go-karts or e-bikes, brushless motors are preferred for their higher efficiency and longevity. VEVOR Brushless Motor Kits

Nichibo Taiwan DC-280ST-20150P-R, 12 Volt DC Brush Motor 10500 RPM Jameco.com Go to product viewer dialog for this item. Brushed DC Motor: 130-Size, 6V, 11.5kRPM, 800mA Stall XON Worldwide Electronics Go to product viewer dialog for this item.