The RedCap Transmission Gear Reduction Box Clutch is a high-performance upgrade designed for 47cc, 49cc, and 50cc 2-stroke pocket bikes, mini bikes, scooters, ATVs, and motorcycles. Engineered for durability and efficiency, this reduction box features a 3:1 gear ratio, ensuring optimal torque and power delivery to meet your riding needs. Unlike smaller 91mm variants, this model has a 116mm housing, providing enhanced stability and longevity. The T8F chain compatibility makes it a perfect fit for many Chinese-made 2-stroke engines, ensuring a seamless installation process. Whether you're looking to increase acceleration or maximize top speed, the included five interchangeable drive sprockets (11T, 13T, 14T, 17T, 20T) allow for customized performance tuning.

Designed for easy installation, this complete transmission kit comes with everything you need, including a reduction box, clutch, drive sprockets, and steel retainer clips for secure fitting. The robust metal construction ensures long-lasting performance, even under demanding riding conditions. With its precisely machined components, this gear reduction box minimizes power loss while improving drivetrain efficiency. Whether you're upgrading a pocket bike, mini dirt bike, or go-kart, this versatile and adjustable gear system provides enhanced control, smoother acceleration, and improved handling, making it a must-have for riders who demand performance and reliability.
  • Wide Compatibility Across Popular Models: Perfect for 43cc-50cc Chinese 2-stroke mini bikes, pocket bikes, scooters, and ATVs. Compatible with companies using T8F chains, including TaoTao, SunL, Coolster, and many more. Check measurements before purchase to provide the perfect match for your vehicle’s transmission system.
  • Gear Reduction Performance: RedCap Transmission Gear Reduction Box is engineered with a 3:1 reduction ratio, ensuring optimal torque and speed control. With a precise 116mm design (not 91mm), it enhances acceleration and power output, making it an ideal upgrade for 47cc-50cc 2-stroke pocket bikes, mini bikes, and scooters.
  • Multiple Sprockets: Includes five interchangeable drive sprockets (11T, 13T, 14T, 17T, and 20T) designed for T8F chains, allowing you to adjust torque and top speed to match your riding needs. Whether you need higher acceleration or maximum speed, this kit provides the flexibility for optimal tuning.
  • Durable Construction: Crafted with premium materials, this transmission kit is built to withstand high-performance riding conditions. The sturdy gear reduction box and clutch assembly provide long-lasting durability, providing smooth power transmission for mini motorcycles, ATVs, and pocket bikes using T8F chains.
  • Hassle-Free Installation Kit: Designed for convenience, this easy-to-install transmission gear reduction kit comes with everything needed, including the reduction box, clutch, five drive sprockets, and five spring steel retainer clips. Compatible with a range of 2-stroke 47cc-50cc engines, providing a secure and reliable fit.
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NOTE: This is 116mm, not 91mm. The size is marked in the picture.