Universal Parts Type-3 Pocket Bike Gearbox Transmission

Restore the snap and reliability of your drivetrain with the Universal Parts Type-3 Gearbox Transmission. Specifically engineered for 47cc and 49cc air-cooled 2-stroke engines, this "Cag-style" transmission acts as a direct-fit replacement for worn or grinding factory gearboxes. Whether you're refreshing a pit bike or building a custom pocket quad, this gearbox ensures your engine's torque is efficiently delivered to the ground with minimal friction and maximum durability.

Key Performance Features

• Optimized 6-Tooth Sprocket: Pre-installed with a high-tensile 6-tooth drive sprocket, perfect for maintaining high-end speed on small-displacement racing engines.
• Chain Compatibility: Fully compatible with T8F / BF05T chain standards, the most common sizes for import pocket bikes and quads.
• Precision 78mm Clutch Drum: Features a balanced internal drum design that matches standard 3-shoe centrifugal clutches for smooth engagement and reduced heat build-up.
• Direct Bolt-On Fit: Designed as a "drop-in" assembly with standard mounting patterns, requiring zero modifications to your Cag or Daytona-style frame.

Comprehensive Fitment Guide

This Type-3 Gearbox is a direct replacement for 47cc and 49cc 2-Stroke engines used in:

Technical Specifications

• Type: Type-3 Gearbox Transmission
• Sprocket Size: 6-Tooth
• Clutch Drum ID: 78mm
• Overall Height: 57mm
• Material: Cast Aluminum Housing / Steel Internals
• Chain Size: T8F or BF05T

 Installation Tip: When installing, ensure your chain tension has roughly 1/2 inch of "play" to prevent premature wear on the gearbox output shaft bearings. 

About Universal Parts

Universal Parts is a comprehensive line of quality, affordable replacement parts for Chinese-made scooters, pocket bikes, and ATVs. From basic consumables to complete drivetrain assemblies, Universal Parts offers reliable solutions to keep your ride running.

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