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

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

$33.99
$33.99
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Product Overview

Restore the torque and drive of your mini-vehicle with the T8F 11-Tooth Sprocket Gearbox. This transmission reduction unit is essential for converting high engine RPMs from 33cc–49cc 2-stroke motors into consistent power for the wheels. Designed for a single-chain setup, the 11-tooth sprocket provides a balanced gear ratio that favors stronger low-end torque and smooth acceleration. Made from high-grade aluminum alloy, this gearbox offers a lightweight yet rugged housing that protects the internal drive system while ensuring peak performance on pocket bikes, buggies, and mini-ATVs.

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
Engine Fitment Standard "Pocket Rocket" style 2-stroke engines

Specifications

Feature Details
Tooth Count 11-Tooth Sprocket
Chain System Single Chain Drive
Total Length 19.7cm (7.57")
Mounting Hole Pitch 70mm (2.75") center-to-center
Material Durable Aluminum Alloy

Key Features

  • Balanced Power Ratio: The 11-tooth sprocket is designed to provide excellent low-to-mid range torque, making it perfect for quick take-offs and consistent climbing on mini-ATVs and dirt bikes.
  • T8F Chain Precision: Optimized exclusively for T8F (8mm) chains to ensure a perfect tooth-to-link mesh, which minimizes the risk of chain slippage and noise during high-speed runs.
  • Heavy-Duty Aluminum Alloy: The housing is cast from premium aluminum to maximize heat dissipation and resist corrosion while remaining light enough to maintain vehicle agility.
  • Smooth Transmission Flow: Precision-aligned internal gears allow for a more fluid power transfer from the clutch to the drive chain, resulting in a more responsive throttle feel.
  • Universal 70mm Mount: Features the industry-standard 70mm bolt pattern, allowing for a direct, "no-drill" installation on most Chinese-manufactured 2-stroke mini-motors.
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Fitment FAQ

Will this part fit my specific model and year?

This gearbox assembly is intended for 33cc–49cc 2-Stroke Mini ATV & Pocket Bike. Key physical/spec details from the product data include Tooth Count: 11-Tooth Sprocket, 11-Tooth Sprocket, Total Length: 19.7cm (7.57"). Use the compatibility table and product photos together before ordering.

Do I need to match the OEM part number?

Yes. If your original part has a stamped OEM or manufacturer number, match that number first before ordering. For this gearbox assembly, also compare the chain size, tooth count, shaft diameter, case style, sprocket alignment, and 2-stroke/4-stroke engine type.

What models or situations does this part not fit?

Do not order this gearbox assembly for machines outside the listed compatibility, or for units with different chain sizes, shaft diameters, tooth counts, sprocket alignment, or case styles. Do not rely only on the model name or engine size.

What should I check before ordering?

Before ordering, compare your original part with the photos and check the chain size, tooth count, shaft diameter, case style, sprocket alignment, and 2-stroke/4-stroke engine type. Recheck listed specs such as Tooth Count: 11-Tooth Sprocket, 11-Tooth Sprocket, Total Length: 19.7cm (7.57"). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.