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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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Fitment FAQ
Will this part fit my specific model and year?
This clutch assembly is intended for 2-Stroke 47cc 49cc Pocket Bike. Key physical/spec details from the product data include Chain Size: 25H Chain, Sprocket Teeth: 7T (7-Teeth), 7T (7-Teeth). 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 Chain Size: 25H Chain, Sprocket Teeth: 7T (7-Teeth), 7T (7-Teeth). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
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