Find the right chain and sprocket kit for your Chinese 50cc–125cc ATV, go-kart, or mini dirt bike. This guide highlights five dependable options that balance durability, ease of installation, and improved acceleration. Each product is suited for riders who want reliable chain drive components that perform under tough trail conditions. Use the quick comparison table below to compare compatibility and standout features at a glance.
Quick Buying Summary
| Product | Best For | |
|---|---|---|
| Relibupdater 428 Chain Set (76mm, 41T rear, 14T front) | Chinese 50cc–125cc ATVs and dirt bikes | High-strength steel, smooth acceleration |
| Relibupdater 420 Rear Sprocket Kit (37T, 96L chain) | 70cc–125cc quad bikes | Includes all parts for easy install |
| RUTU 420 37T Rear Sprocket Kit | 50cc–125cc Tao Roketa Coolster quads | 68mm/48mm mounting options, heat-treated steel |
| Relibupdater 420 Chain Set (37T rear, 17T front) | 50cc–125cc mini bikes and ATVs | Effortless installation, durable heat-treated parts |
| LIDSCURA 428 Chain Set (41T rear, 14T front) | Chinese dirt bikes and ATVs | Steel construction, smoother acceleration |
Relibupdater 428 Chain Set
This kit uses a 428 chain with a 76mm rear sprocket and a 14-tooth front sprocket (17mm). It is designed for Chinese 50cc–125cc pit bikes, dirt bikes, ATVs, and quad motorcycles. The front and rear combination aims for smoother acceleration and improved efficiency. The sprocket gear is made from high-quality steel for durability. Best for riders who need a complete install-ready package with reliable materials.
Best for: riders seeking a complete, ready-to-install 428 chain and sprocket upgrade for small-displacement Chinese ATVs and dirt bikes. Choose this if you want a solid, all-in-one kit with a focus on smoother power delivery.
Caution: Installation may require basic tooling; ensure alignment to avoid premature wear. Some models may need additional spacers depending on mounting patterns.
Relibupdater 420 Rear Sprocket Kit
This kit pairs a 96L chain with a 37T rear sprocket and a 14T front sprocket, specifically for 70cc–125cc ATVs and quad bikes. It emphasizes ease of installation and a straightforward replacement process. The package aims to deliver smoother acceleration and improved efficiency for off-road riding. Best for: riders upgrading older or worn sprockets on Chinese-made ATVs and mini bikes.
Limitation: May require a chain tool for exact sizing; verify chain length compatibility with your model before installation.
RUTU 420 Rear Sprocket Kit
Designed for 50cc–125cc Tao Roketa, Coolster, Kazuma, Sunl, and similar Chinese quads, this rear sprocket features 68mm mounting hole spacing and 48mm spacing for adjacent holes. It uses premium steel and heat-treatment to improve strength and wear resistance. It also describes a radius curve to reduce transmission friction and extend chain life. Best for: riders who need precise bolt spacing compatibility and a heat-treated build for challenging trails.
Caution: Double-check mounting hole spacing on your wheel hub to avoid misfit. Some bikes may require longer bolts or spacers.
Relibupdater 420 Chain Set (37T Rear, 17T Front)
This kit offers a 420 chain with a 37-tooth rear sprocket and a 17-tooth front sprocket (17mm). It emphasizes easy installation and compatibility with 50cc–125cc bikes, mini bikes, ATVs, and go-karts. The kit is built for stronger performance and durability through heat-treated components. Best for: riders seeking a reliable, user-friendly upgrade that supports quick trail returns after maintenance.
Limitation: Some installations may require alignment checks to ensure the chain lines up perfectly with the front sprocket.
ZTDZZH 53 Tooth Rear Sprocket Kit
This kit features a 53-tooth rear sprocket with a 76mm center diameter for 420 chains. It is suitable for 50cc–125cc dirt bikes, ATVs, and pit bikes. The instruction notes a 92mm center hole and 8.5mm screw mounting options, guiding users to verify compatibility before purchase. Best for: riders who want a higher rear gearing to improve top-end performance on smaller engines.
Limitation: The geometry is specific; confirm the hole pattern and center diameter on your wheel before ordering.
XIKOBY 428 Drive Chain With Front Sprocket
This set includes a 428 drive chain with 102 links and a 17T front engine sprocket. It’s designed for a wide range of 50cc–125cc dirt bikes, ATVs, and go-karts, including Tao Tao, Coolster, NST, SunL, Kazuma, and Vitacci. The kit uses high-strength steel and heat-treated components for durability. Best for: riders who need a complete drivetrain upgrade that supports heavy-use riding and long life.
Limitation: The 102-link chain length may require trimming or additional links for some models; verify your current chain length.
Buying Guide: Key Considerations For Choosing ATV Chain And Sprockets
- Engine Size And Vehicle Type: Match sprocket tooth counts to your engine’s power band and your riding style (trail, racing, or casual). Smaller engines benefit from taller gearing for torque, while larger engines may favor higher top speed with lower torque loss.
- Chain Type And Compatibility: Most options use 420 or 428 chains. Confirm chain width and compatibility with your current sprockets to ensure proper engagement and reduce wear.
- Mounting And Bolt Patterns: Check center-to-center hole spacings (commonly 48mm or 68mm) and screw sizes. Incompatible mounting can require adapters or additional hardware and may void warranties.
- Material And Heat Treatment: Steel sprockets with heat-treatment resist wear and corrosion, extending life in dusty/off-road conditions. Avoid low-grade materials on rugged trails.
- Installation Simplicity: Some kits include all necessary parts and even chain breakers. If you’re not confident with DIY installation, seek kits marketed as “easy installation.”
- Warranty And Returns: Look for clear return policies and any manufacturer warranty terms. Durability and fit can vary by model, so ensure you can exchange if needed.
Frequently Asked Questions
- Which chain size should I choose for a Chinese 50cc–125cc ATV?
– Choose a 420 or 428 chain based on your existing setup. Check the sprocket hole spacing and chain width to ensure compatibility. - Can I install a larger rear sprocket for more torque?
– Yes, but be mindful of the effect on top speed and chain tension. Larger rear sprockets require proper chain length and may affect clutch performance. - Is it necessary to replace the front sprocket when changing the rear?
– Replacing both can ensure balanced wear and smoother operation, but it is not always required if the front is still in good condition. - Do I need specialized tools to install these kits?
– Many kits are designed for easy install but may require common tools and a chain breaker. Verify included hardware and tools before purchasing. - Will heat-treated sprockets last longer in dusty trails?
– Heat-treated steel generally offers greater wear resistance and longer life in abrasive conditions, which is common in off-road riding. - How do I know if a sprocket fits my ATV model?
– Confirm mounting hole spacing, center-to-center dimensions, and overall diameter stated in product specs against your bike’s hub and mounting pattern.