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7-Tooth Centrifugal Clutch & Gearbox Assembly for 2-Stroke 47cc 49cc Pocket Bike | 25H Chain
7-Tooth Centrifugal Clutch & Gearbox Assembly for 2-Stroke 47cc 49cc Pocket Bike | 25H Chain
4.33 / 5.0
(3) 3 total reviews
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Product Overview
Upgrade your mini-bike’s drivetrain with this Complete Centrifugal Clutch and Gearbox Assembly. Specifically designed for 47cc and 49cc 2-stroke "Pocket Bike" style engines, this unit integrates the clutch pads and the reduction gearbox into one high-performance package. Featuring a 7-tooth drive sprocket optimized for the common 25H chain, this assembly ensures stable power delivery and smooth acceleration for mini motos, quads, and scooters.
Product Compatibility
| Component | Specification |
| Engine Type | 2-Stroke Air-Cooled (47cc / 49cc) |
| Chain Size | 25H Chain |
| Sprocket Teeth | 7T (7-Teeth) |
| Pitch (Segment Spacing) | 8mm |
| Common Models | MTA1, MTA2, Cagllari, Lucky 7, Coolster Mini Quad |
Specifications
| Feature | Details |
| Sprocket Type | 7-Teeth Gearbox Output |
| Chain Compatibility | 25H High-Strength Chain |
| Tooth Pitch | 8mm Segment Spacing |
| Construction | Heavy-Duty Alloy & High-Friction Pads |
| System Type | Integrated Clutch & Reduction Box |
Key Features
- Complete Drivetrain Solution: Combines the centrifugal clutch pads and the gearbox housing, providing a direct replacement that simplifies repairs and ensures perfect internal alignment.
- Optimized for 25H Chains: The 7-tooth sprocket is precision-cut to fit 25H chains with an 8mm pitch, reducing chain slap and preventing premature wear on the drive links.
- Stable Centrifugal Engagement: Features high-quality friction pads and tension-calibrated springs that engage smoothly as RPMs rise, preventing the engine from stalling at idle.
- Heavy-Duty Gear Reduction: The internal gearing is manufactured for high-speed durability, effectively transferring the 2-stroke engine's power to the rear wheel with minimal energy loss.
- Robust & Durable Design: Built with high-grade materials to withstand the high vibrations and temperatures of mini-moto racing, ensuring long-term reliability and consistent performance.
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FAQs
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They are good but the teeth are a little worn out
Used for Mototec pocket bike (curvier fender design, not angular) - works like a charm!!!! Just make sure this is the right one for your bike/this fits your bike and is the one you want. Of this size on amazon, I only found 6 and 7 tooth pinion gear options. Less teeth on the pinion means more acceleration and less top speed, more teeth on the pinion meaning the opposite. Stock, my bike had the 7 tooth, so that’s what I bought.
good