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6-Tooth 25H Clutch Drum Gearbox & 3-Spring Clutch Pad Kit for 47cc 49cc 2-Stroke Mini ATV
6-Tooth 25H Clutch Drum Gearbox & 3-Spring Clutch Pad Kit for 47cc 49cc 2-Stroke Mini ATV
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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.
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Fitment FAQ
Will this part fit my specific model and year?
This clutch assembly is intended for Vehicle Type; Displacement; Common Models; Mini Dirt Bikes; 47cc, 49cc; MTA1, MTA2, Lucky 7, Cagllari; Kids ATVs / Quads. Key physical/spec details from the product data include 6-Teeth (6T), Clutch Shaft Diameter: 12mm (0.47"), 47cc. 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 clutch assembly, also compare the spline count, clutch bell diameter, pulley diameter, spring style, belt width, and engine platform.
What models or situations does this part not fit?
Do not order this clutch assembly for machines outside the listed compatibility, or for units with different spline counts, clutch-bell sizes, pulley diameters, or engine platforms. 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 spline count, clutch bell diameter, pulley diameter, spring style, belt width, and engine platform. Recheck listed specs such as 6-Teeth (6T), Clutch Shaft Diameter: 12mm (0.47"), 47cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
Perfect Replacement for the OEM part