Sprockets are a core part of motorcycle drivetrains, influencing acceleration, top speed, and chain life. This guide highlights five well-regarded sprockets that fit common 428 and 420 chains across popular Chinese-brand bikes, ATVs, dirt bikes, and mini motos. Each option offers sturdy construction, precise fitment, and clear sizing details to help you pick the right tooth count and mounting specs for your ride.
| Product | Brand | Teeth | Sprocket Size / Mount |
|---|---|---|---|
| HIAORS 428 Front Sprocket | HIAORS | 17T | 17mm center/eye-to-eye 30mm |
| JT Sprockets JTR269.45 Rear Sprocket | JT | 45T | Rear, 428 chain |
| JT Sprockets JTR478.45 Rear Sprocket | JT | 45T | Rear, 428 chain |
| Bccxzm 428 Front Sprocket | Bccxzm | 15T | 17mm mount |
| CQSPMOTO 420 Front Sprocket | CQSPMOTO | 12T | 17mm mount; 420 chain |
HIAORS 428 Front Sprocket 17T for 50cc-160cc Machines
This HIAORS front sprocket is designed for 428 chains and measures 17 teeth with a 17mm mounting bore. The eye-to-eye spacing is 30mm, ensuring a straightforward installation on compatible bikes and ATVs such as TaoTao, Roketa, Coolster, Sunl, and similar models. Built to withstand typical dirt-bike use, it offers reliable engagement with minimal wear when paired with a compatible chain and rear sprocket.
JT Sprockets JTR269.45 45T Rear Sprocket
This JT rear sprocket features heat-treated, hand-finished steel designed to outperform mild steel or surface-hardened rivals. It’s built to outlast typical OEM equivalents and is configured for a specific vehicle fit. Ideal for riders seeking longer service life and dependable engagement in a range of 50cc through 160cc motorcycles and ATVs that use a 428 chain setup.
JT Sprockets JTR478.45 45T Rear Sprocket
Another JT rear sprocket option, this 45-tooth model is noted for its United States origin. It provides solid durability and a reliable fit for vehicles using a 428 chain. The design supports consistent power transfer in sport or utility-ridden dirt bikes and ATVs, contributing to smoother acceleration and longer chain life when paired with the proper front sprocket and chain.
Bccxzm 428 Front Sprocket 15T 17mm
The Bccxzm 428 front sprocket provides a 15-tooth option with a 17mm mounting bore. It’s designed for 428 chain compatibility and lists a 7mm thickness, indicating a robust construction intended for daily dirt-bike or ATV use. It includes a note on distinguishing 420 vs. 428 sprockets by thickness, which can help prevent incorrect purchases for your engine configuration.
CQSPMOTO 420 Front Sprocket 12T 17mm
The CQSPMOTO 420-12T front sprocket is tailored for 420-chain systems and features a 17mm bolt pattern with a 30mm hole-to-hole spacing. The 12-tooth configuration supports quicker revs and more responsive acceleration for small-displacement bikes, pit bikes, and go-karts. It’s compatible with multiple Chinese brands, including TaoTao, Roketa, and Coolster, among others.
Buying Guide
Consider the following when choosing sprockets for motorcycles and ATVs:
- Chain compatibility: Ensure the sprocket supports either 428 or 420 chains as required by your drivetrain. Mismatched chains cause rapid wear or failure.
- Tooth count and gearing goals: Higher rear teeth or lower front teeth typically yield better acceleration; more teeth on the rear sprocket can improve top speed at the expense of low-end torque. Balance based on riding style and terrain.
- Mounting bore and spacing: Verify bore size (commonly 17mm in these options) and mounting hole spacing to avoid fitment issues.
- Material and finish: Heat-treated steel and durable finishes extend life under dirt, grit, and impact. Hand-finished rails may indicate tighter tolerances.
- Brand compatibility and availability: Reputable brands like JT and HIAORS often provide consistent fitment across models; check exact vehicle fitment lists or OEM standards.
- Maintenance: Regular cleaning and proper chain tension extend sprocket life. Replace sprockets and chains in matched sets when wear is evident.
- Installation notes: Some sprockets include retainers or bolts; verify included hardware and torque specs before installation.
Across these options, buyers should align tooth counts with the engine size and intended riding conditions — from urban commuting to off-road dirt trails. For long-term durability, pair a high-quality rear sprocket with a matched front sprocket and a compatible chain, ensuring precise alignment and consistent lubrication.