T8F 11-Tooth Transmission Gearbox (Double Chain) for 33cc–49cc 2-Stroke Mini ATV & Pocket Bike

Product Overview

Upgrade your mini-motor’s drivetrain with the Heavy-Duty T8F Double Chain Gearbox. Unlike standard single-chain units, this double-chain (twin belt/chain internal) design provides superior torque handling and smoother power distribution for 33cc to 49cc 2-stroke engines. Featuring a precision 11-tooth sprocket, this gearbox is engineered to maximize acceleration and deliver a more responsive throttle feel. The compact aluminum housing is built to withstand the high RPMs of pocket bikes and mini-quads, ensuring a reliable connection between your engine's clutch and the drive chain.

Product Compatibility

Component Type	Specification
Engine Type	2-Stroke (Air-Cooled)
Displacement	33cc, 34cc, 47cc, 49cc
Chain Type	T8F Only (8mm pitch)
Vehicle Types	Pocket Bikes, Mini Dirt Bikes, Mini ATVs, Buggies, Go-Karts
Internal Design	Double Chain (Reinforced Drive)

Specifications

Feature	Details
Tooth Count	11-Tooth Sprocket
Gearbox Style	Double Chain Internal Reduction
Total Length	17.3cm (6.81")
Mounting Hole Pitch	70mm (2.75") center-to-center
Material	High-Grade Aluminum Alloy

Key Features

• Double Chain Internal Drive: Engineered with a double-chain internal mechanism to provide increased strength and smoother power transfer compared to standard single-chain gearboxes.
• Optimized Torque & Acceleration: The 11-tooth sprocket is specifically geared to help small 2-stroke engines reach higher speeds quickly while maintaining smooth, consistent acceleration.
• Lightweight Aluminum Housing: Constructed from a durable aluminum alloy that effectively dissipates heat and resists corrosion without adding unnecessary weight to your mini-bike.
• Precision T8F Fitment: Designed for exclusive use with T8F (8mm) chains, ensuring a perfect "bite" that prevents chain jumping and reduces mechanical noise during high-speed operation.
• Universal 70mm Mounting: Features the standard 70mm bolt pattern used on most Chinese-manufactured 2-stroke "Pocket Rocket" style engines for a quick, bolt-on installation.