Choosing a reliable sprocket for your mini bike, go-kart, or dirt bike is essential for smooth power transfer and long-lasting performance. This guide highlights five top-rated chainsaw-compatible sprockets designed to fit a 35- to 60-tooth range and work with 35-chain systems. Each option is evaluated for durability, fit, and compatibility with common mini-bike models. Use the quick reference below to compare key specs at a glance.
| Product | Brand | Tooth Count | Chain Type | Fitment Notes |
|---|---|---|---|---|
| 35 Chain Sprocket – 40 Tooth Sprocket | PSLER | 40 | 35 Chain | For CC100X, CK100, Baja DB30, TaoTao GK80, Predator, MBX10/MBX11, etc. |
| MRELC Ultimate 420 Set | MRELC | 13 front / 35 rear | 420 Chain | Fits engines 50cc–170cc; includes chain and front/rear sprockets |
| JNDO Mini Bike Sprocket 60T | JNDO | 60 | 35 Chain | Predator 6.5–13HP engines; six-mount holes |
| JMCHstore 40T High Speed Rear Sprocket | JMCHstore | 40 | 420/40 chain variants | For Coleman CT100U, CC100X, Baja DB30; upgrade-friendly |
| CILOYU 60T Sprocket with 90 Links | CILOYU | 60 | 420 Chain | Compatibility with Predator, Coleman BT200X, Baja MB-series, etc. |
Product selections focus on hardware constructed for durability, compatibility with a range of 35- to 60-tooth systems, and practical installation options. The list emphasizes reputable brands and sprockets designed for mini bikes, go-karts, and dirt bikes commonly used in American hobbyist settings.
35 Chain Sprocket – 40 Tooth Sprocket for 35 Chain
The PSLER 35 chain rear sprocket combines a rugged quenching-treated surface with a 6-hole mounting pattern for reliable installation on common mini-bike frames. The surface burn marks indicate a hardened finish intended to extend wear resistance under high-torque conditions typical of go-kart and dirt bike use. Fitment notes caution buyers to verify dimensions against their specific vehicle model, as the 40-tooth rear sprocket is designed for 35-chain systems and supports a variety of popular models, including Coleman, TaoTao, and Predator lines.
Key features include: a hardenable construction that improves durability, compatibility with 40-tooth rear setups on 35-chain bikes, and a broad fitment range. The product page emphasizes customer support for fitment questions and a reference-only model lineup to guide purchasers. This sprocket is positioned as a practical upgrade or replacement part for riders seeking durable gearing capable of handling moderate power transfers in compact machines.
Pros:
- Durable surface treatment for wear resistance
- Six mounting holes support secure attachment
- Broad compatibility with popular mini-bike models
Cons:
- Model references are for reference only; verify exact fit before purchase
- Burn marks may appear unusual to first-time buyers
MRELC Ultimate 420 Chain & Sprocket Set
This comprehensive drivetrain upgrade pairs a heavy-duty 420 chain with two robust sprockets in a single kit. The front sprocket has 13 teeth, and the rear sprocket has 35 teeth, delivering a balanced gearing ratio suitable for 50cc–170cc engines commonly found in dirt bikes, ATVs, go-karts, and mini bikes. Made from corrosion- and heat-resistant stainless steel, the sprockets are designed for longevity even in harsh riding conditions. The included 120-link chain is adjustable via a master link, allowing precise tailoring to your chassis.
Highlights include: compatibility with a wide engine range, durable chain construction, and corrosion-resistant sprockets designed for long service life. The set is marketed to enthusiasts seeking a complete upgrade with reliable performance across a variety of small displacement machines.
Pros:
- All-in-one drivetrain upgrade
- Long-lasting stainless steel sprockets
- Adjustable chain length for a custom fit
Cons:
- Requires compatible frame and mounting points
- Some fitment specifics may require measurement checks
JNDO Mini Bike Sprocket 60T
The JNDO 60-tooth rear sprocket provides a robust option for Predator and other small-displacement engines. Forged from carbon steel, this sprocket is designed to withstand high torque and abrasive riding conditions. The electrophoretic black armor finish resists mud, salt, and scratches, helping prevent corrosion on wet trails. With CNC-machined teeth designed to fit 35 chain systems, the 60T configuration helps improve chain engagement, minimize slippage, and deliver smoother power transfer at higher speeds. Six mounting holes enable straightforward installation on compatible hubs and frames.
Key benefits include: strong steel construction for extended life, corrosion resistance from a protective coating, and precise teeth geometry for reliable engagement. This makes it a strong candidate for riders who frequently ride through muddy or challenging terrain while wanting dependable rear gearing.
Pros:
- High-strength carbon steel construction
- Corrosion-resistant finish extends life
- Six mounting holes for versatile mounting
Cons:
- May require exact chain compatibility checks for some models
- 60T may increase gear ratio noticeably on some setups
JMCHstore 40T High Speed Rear Sprocket
The JMCHstore 40T rear sprocket is designed for 420 and 40 chain configurations and is advertised for use with Coleman CT100U CC100X, Baja Doodle Bug DB30, Monster Mega Moto, and other upgradable engines. The product note clarifies that it does not fit every go-kart mounting pattern due to variations in mounting patters across models. The sprocket is pitched as ideal for upgrading engines to handle higher speeds and improved power transfer, with compatibility extending to Monster Mega Moto MMB80 and MBX10/MBX105 among others. The design emphasizes enhanced engine support for larger engines up to 212cc in certain configurations.
Pros:
- Designed for upgraded engines and high-speed use
- Compatible with a wide range of models
- Clear notes on mounting pattern variability
Cons:
- Requires confirmation of mounting pattern before purchase
- Not universal across all Coleman/DB30 variants
CILOYU 60T Sprocket With 90 Links
The CILOYU 60T Sprocket with 90 links is a versatile rear sprocket kit featuring a 60-tooth design for 420 chain setups, along with front chain and jackshaft support. Compatibility spans Predator 212cc to 196cc engines, including Coleman BT200X/CT200U lines, Baja MB-series, and other popular mini bikes. The kit’s 40mm bore ensures fitment with common rear hubs, and the 90-link chain provides a ready-to-install integration with front chains and sprockets. This option targets riders seeking a complete rear-drive upgrade to improve power delivery across terrains.
Pros:
- Broad compatibility with multiple mini bike brands
- Includes chain length compatible with 90-link rear setup
- 40mm bore supports a range of hubs
Cons:
- Needs precise measurement to ensure fit with specific models
- May be more than needed for stock engines on some bikes
Buying Guide: Key Purchase Considerations
When selecting a sprocket for bike chains, consider gearing needs, chain compatibility, and mounting patterns. For engines in the 50cc–170cc range, a 35–40 tooth rear sprocket paired with a 13-tooth front sprocket within a 420 chain setup often delivers a good balance of torque and top speed. If upgrading to a larger engine (e.g., 196cc to 212cc), you may opt for 60T rear sprockets to increase drive ratio, provided the frame and chain length are adjustable. Durability matters: look for hardened steel, stainless steel, or coated finishes that resist corrosion and wear. Confirm mounting hole patterns and bore diameter to match your hub and axle.
Other considerations include:
- Compatibility: Verify model-specific fitment and mounting patterns before purchase.
- Chain type and length: Ensure 420 or 35 chain selections align with your existing drive train.
- Installation: Six mounting holes and standard bore sizes generally simplify installation.
- Maintenance: Stainless or coated sprockets require less frequent cleaning to prevent corrosion.
- Long-term reliability: Choose reputable brands with documented load ratings and materials.
Comparison snapshot for quick reference:
- Durability: Stainless/Coated > Carbon Steel
- Fitment: Broad fitment varies by model; always double-check mounting patterns
- Installation: Six-hole designs commonly simplify mounting
- Value: All-in-one sets (like the MRELC kit) offer convenience and consistency