6-Tooth 25H Clutch Drum Gearbox & 3-Spring Clutch Pad Kit for 47cc 49cc 2-Stroke Mini ATV

Product Overview

Revitalize your mini-moto's drivetrain with this Complete 25H Transmission Upgrade Kit. This dual-component package includes a heavy-duty 3-spring centrifugal clutch and a matching 6-tooth reduction gearbox. Specifically engineered for 47cc and 49cc 2-stroke engines, this kit replaces slipping pads and worn drums to restore aggressive acceleration and smooth power transfer. Crafted from high-quality aluminum, it offers a simple yet efficient performance boost for kids' dirt bikes, quads, and go-karts.

Product Compatibility

Vehicle Type	Displacement	Common Models
Mini Dirt Bikes	47cc, 49cc	MTA1, MTA2, Lucky 7, Cagllari
Kids ATVs / Quads	2-Stroke	TaoTao, Coolster, Rosso, Peace Sports
Go-Karts / Scooters	47cc, 49cc	Various 2-Stroke Chinese Mini-Motos
Chain Type	25H Chain	Small-link high-speed drive chains

Specifications

Feature	Details
Gearbox Sprocket	6-Teeth (6T)
Chain Compatibility	25H Chain
Gearbox Mounting Holes	70mm (2.75") Center-to-Center
Clutch Shaft Diameter	12mm (0.47")
Clutch Configuration	3-Shoe with Integrated Springs
Material	High-Grade Aluminium & Friction Composite

Key Features

• Complete Drivetrain Synergy: By replacing both the clutch pads and the drum/gearbox simultaneously, you ensure perfect friction alignment and eliminate "glazing" issues caused by mismatched old parts.
• 3-Spring High-Tension Clutch: The triple-spring design provides a balanced centrifugal engagement, ensuring the bike doesn't stall at low idle while offering a firm "bite" during acceleration.
• Optimized 6T Gear Ratio: The 6-tooth sprocket is designed for the 25H chain to provide high-speed efficiency and smoother take-offs for lighter mini-moto frames.
• Premium Aluminium Build: Constructed from high-quality aluminum for superior heat dissipation, preventing the gearbox from overheating during long riding sessions.
• Simple & Efficient Upgrade: Designed for a 100% bolt-on fit. The standard 70mm mounting spacing and 12mm shaft hole allow for a quick installation without specialized tools or modifications.