After researching manufacturer specifications, published industry standards, and aggregated owner feedback, we evaluated the most popular clutch kits for go karts. Our comparison focuses on engagement quality, heat management, material durability, and ease of installation. Whether you need a replacement for a stock engine or an upgrade for racing, this guide will help you choose the right clutch for your kart and engine combination.
| Photo | Product | Score | Buy |
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Hillman Go Kart Clutch Kit 12T #35 Chain Best Overall 12-tooth, #35 chain, 3/4 inch bore, 1 inch shaft length |
9.0 | 🛒 Check Price |
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Noram GE Clutch Kit 14T #35 Chain Best for Racing 14-tooth, #35 chain, 3/4 inch bore, adjustable engagement |
8.7 | 🛒 Check Price |
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Azusa 12T Clutch Kit #35 Chain Best Value 12-tooth, #35 chain, 3/4 inch bore, sintered bronze bushing |
8.4 | 🛒 Check Price |
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Comet 30 Series Torque Converter Clutch Kit Best Torque Converter 30 series, #35 chain, 3/4 inch bore, includes driver and driven pulleys |
8.1 | 🛒 Check Price |
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BULLETPROOF 12T Go Kart Clutch Kit Heavy Duty Pick 12-tooth, #35 chain, 3/4 inch bore, steel construction |
7.8 | 🛒 Check Price |
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Mophorn Go Kart Clutch Kit 12T #35 Budget Friendly 12-tooth, #35 chain, 3/4 inch bore, zinc-plated finish |
7.3 | 🛒 Check Price |
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Rage Powersports Go Kart Clutch Kit 12T Entry Level 12-tooth, #35 chain, 3/4 inch bore, includes key |
7.0 | 🛒 Check Price |
1. Hillman Go Kart Clutch Kit 12T #35 Chain: Best Overall
The Hillman 12T clutch kit is a solid performer for recreational and light-racing go karts. Based on owner feedback and the spec sheets, it engages smoothly around 2200 RPM, which matches well with common 4-7 hp engines. The heat-treated sprocket and drum help prevent premature wear, and many users report consistent performance over several seasons of weekend use.
However, this clutch is not built for extreme torque. If you are running a modified racing engine over 10 hp, the engagement may slip or the drum could overheat. Skip this if you need a high-RPM clutch for competitive racing; look for a multi-disc or adjustable unit instead.
- Smooth engagement at 2200-2400 RPM, suitable for most 4-7 hp engines.
- Heat-treated sprocket and drum resist wear from sustained use.
- Includes clutch, sprocket, and key; bolts directly to most centrifugal clutch mounts.
Pros: Reliable engagement across a wide RPM range.; Easy to install with included hardware.; Good heat dissipation for extended runs.
Cons: Not recommended for high-torque racing engines above 10 hp.
2. Noram GE Clutch Kit 14T #35 Chain: Best for Racing
The Noram GE is a favorite among serious kart racers. In our evaluation of the spec sheets and owner feedback, its adjustable engagement system allows fine-tuning from a mild 1800 RPM to aggressive 4000+ RPM by swapping springs. The needle bearing and heavy drum reduce friction and heat, making it suitable for long races. Many competitive karters rely on this clutch for consistent starts.
That said, this kit demands a higher budget and a willingness to tinker. If you just want a simple replacement for a backyard kart, the extra cost and complexity may not be justified. Skip this if you prefer a set-and-forget clutch or are on a tight budget.
- Adjustable engagement RPM via spring changes (1800-4000+ RPM).
- Heavy-duty drum and needle bearing for high-RPM durability.
- Popular in competitive karting; replacement parts widely available.
Pros: Highly tunable for different engine and track conditions.; Durable construction handles sustained high RPM.; Proven in racing environments with strong owner support.
Cons: Higher price point due to adjustable features.; Setup requires some mechanical knowledge to dial in.
3. Azusa 12T Clutch Kit #35 Chain: Best Value
The Azusa 12T clutch kit offers great bang for the buck. Based on owner feedback and the spec sheets, the sintered bronze bushing provides smooth engagement and decent longevity for typical recreational karts with engines up to 6.5 hp. It is a direct replacement for many stock clutch applications and installs easily.
However, the bushing design is a weak point for sustained high-RPM use. If you plan to race or run a built engine, the bushing will wear out faster than a needle bearing clutch. Skip this if you need a durable clutch for competitive racing; consider a more strong unit instead.
- Sintered bronze bushing reduces friction and extends life.
- Standard 12-tooth sprocket works with most #35 chain drives.
- Affordable price makes it a top choice for budget builds.
Pros: Excellent value for the price.; Reliable performance for stock engines up to 6.5 hp.; Simple installation with basic tools.
Cons: Bushing wears faster than needle bearing under heavy use.; Not suitable for high-horsepower or racing applications.
4. Comet 30 Series Torque Converter Clutch Kit: Best Torque Converter
The Comet 30 Series is a torque converter system that replaces a standard clutch. In our research, owner feedback highlights its ability to provide smooth acceleration and better hill climbing by keeping the engine in its power band. It is a popular upgrade for off-road and utility karts where variable speed is beneficial.
However, installation is more involved than a simple clutch swap, and the added weight and bulk may not suit all frames. If you have a lightweight racing kart or want a simple, low-maintenance setup, this system may be overkill. Skip it if you prefer a direct-drive clutch or have limited space.
- Variable ratio torque converter provides smooth acceleration and hill climbing.
- Includes both driver and driven units with belt; fits most 5-8 hp engines.
- Reduces strain on engine by allowing it to operate in power band.
Pros: Excellent for off-road and hilly terrain.; Improves acceleration and top speed over a fixed clutch.; Durable components with good owner satisfaction.
Cons: More complex installation and setup.; Heavier and bulkier than a standard centrifugal clutch.
5. BULLETPROOF 12T Go Kart Clutch Kit: Heavy Duty Pick
The BULLETPROOF 12T kit is marketed as a heavy-duty option. Based on owner feedback, the all-steel construction offers decent longevity for the price, but some users have noted engagement RPM variations. It works well for recreational karts with moderate power, but the quality control seems less consistent than top-tier brands.
If you need a clutch for a rental fleet or high-hour use, the potential inconsistency may be a concern. Skip this if you require precise engagement every time; consider the Hillman or Noram for more reliable performance.
- All-steel construction for increased durability.
- Includes clutch, sprocket, and key; fits standard mounts.
- Engagement around 2400 RPM for moderate engine power.
Pros: Sturdy build quality at a reasonable price.; Compatible with many common engines.; Good for occasional heavy use.
Cons: Some owners report inconsistent engagement out of the box.; Not as refined as higher-priced options.
6. Mophorn Go Kart Clutch Kit 12T #35: Budget Friendly
The Mophorn clutch kit is the most budget-friendly option we evaluated. It fits small engines and works for occasional use, but based on owner feedback, its durability is limited. The zinc plating helps prevent rust, but the internal components wear quickly under load. It is best suited for low-power karts used infrequently.
If you plan to ride regularly or have a larger engine, the Mophorn clutch may fail prematurely. Skip this if you need reliability; spend a bit more for the Azusa or Hillman for better longevity.
- Low-cost option for basic replacement needs.
- Zinc-plated finish resists surface rust.
- Lightweight design suitable for small engines up to 5 hp.
Pros: Very affordable.; Works for light-duty applications.; Easy to install.
Cons: Short lifespan under regular use.; Engagement can be jerky; not ideal for smooth starts.
7. Rage Powersports Go Kart Clutch Kit 12T: Entry Level
The Rage Powersports clutch is the most basic option we reviewed. It is designed for small engines, such as those on kids karts or minibikes. Owner feedback indicates that it may only last a few hours before slipping or wearing out. The materials are minimal, and the engagement is often rough.
This clutch is best reserved for very light, occasional use. If you have a full-size adult kart or plan to ride for more than a few hours total, skip this entirely. It is not a good value in the long run despite the low upfront cost.
- Lowest price point among surveyed clutches.
- Basic design for 2-4 hp engines.
- Simple installation with minimal tools.
Pros: Extremely low cost.; Good for very small engines or kids karts.; Lightweight.
Cons: Very short lifespan; often fails within a few hours.; Not suitable for adult-sized karts or engines over 5 hp.
Frequently Asked Questions
How do I know which tooth count and chain size I need?
Check your go kart’s engine shaft diameter (usually 3/4 inch or 1 inch) and the chain pitch (most common is #35 or #40). The tooth count (e.g., 12T, 14T) affects gearing; fewer teeth give quicker acceleration, more teeth give higher top speed. Consult your kart’s manual or measure your existing clutch.
Can I use a clutch kit on a torque converter system?
No. A clutch kit replaces a centrifugal clutch, while a torque converter uses a belt and pulleys for variable ratio. They are not interchangeable without modifying the engine mount and drive system. Choose based on your kart’s existing setup.
How often should I replace the clutch?
It depends on usage. For recreational riding, a quality clutch may last 1-2 seasons. For racing, inspect after every event. Signs of wear include slipping, rough engagement, or visible damage to shoes or drum. Replace when performance degrades.
What tools do I need to install a clutch kit?
Typically you need a socket set (often 7/16 or 1/2 inch), a puller tool for the old clutch, and a torque wrench. Some kits include a key; you may need a file to fit the keyway. Always follow the manufacturer’s instructions.
Is a higher engagement RPM always better?
Not necessarily. Higher engagement (e.g., 3000+ RPM) gives a more aggressive start, ideal for racing, but can be harsh for recreational karts or beginners. Lower engagement (around 2000 RPM) provides smoother starts and is easier on the drivetrain. Choose based on your engine power and riding style.
Our Verdict
After researching and comparing specifications and owner feedback, the Hillman 12T clutch kit stands out as the best overall for its reliable engagement, good heat dissipation, and ease of installation. For those seeking a racing-oriented adjustable clutch, the Noram GE is the top runner-up, offering tunability and high-RPM durability. Both represent excellent value for their respective use cases.
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