Best Auto Clutch For Motorcycle: Compare 7 Clutch Assemblies

#1 · Best Overall

1. 1PZ 17T Semi Automatic Clutch

• Weight: 3.2 lb
• Package Dimensions: 5.04 x 4.92 x 3.03 in

Best for: 17T Chinese ATV and go-kart replacement.

Why it ranks #1: Its 17T gear, 4-1/2-inch diameter, and stated 50cc–135cc fit cover a broad range of listed small-engine ATV, dirt-bike, and go-kart applications.

A 17-tooth drive gear and 4-1/2-inch clutch diameter make the 1PZ assembly a clearly specified option for semi-automatic reverse engines. It is listed for 50cc, 110cc, 125cc and 135cc ATVs, dirt bikes and go-karts, including several Chinese makes, giving owners a defined fit range to check.

The semi-automatic design and stated reverse-engine application target vehicles that use that setup, while the 17T gear gives buyers a concrete tooth-count requirement to match. Its iron construction is described as sturdy, wear-resistant and quick to dissipate heat, supporting use in powersports equipment. The 4-1/2-inch diameter adds another measurement for fit checking. The package contains one clutch assembly, so buyers should account for any other service parts their installation requires.

Skip it if you need a listed multi-piece hardware kit; AuInLand’s 18-tooth assembly includes gasket, bearings, spring, screws, bolts, washers and spacers.

This suits owners of listed Chinese-brand ATVs, dirt bikes or go-karts using a 17T semi-automatic reverse engine. Check the 4-1/2-inch diameter and engine application before choosing; the package lists the clutch assembly alone.

Listed on Amazon as: 1PZ 17 Teeth Semi Automatic Clutch Assembly for 50cc 110cc 125cc 135cc ATV Quad Go Kart Dirt Bike Roketa Kazuma JCL NST SUNL Taotao

#2 · Best Semi-Auto Fit

2. CLEO 17T Clutch Assembly

• Weight: 3.47 lb
• Package Dimensions: 5.35 x 5.28 x 2.68 in

Best for: 17T semi-auto application matcher.

Why it ranks #2: It explicitly fits semi-automatic 50cc–125cc engines and specifies a 17T drive gear, making its intended small-engine use clear.

The CLEO assembly specifies a 17-tooth drive gear for semi-automatic 50cc–125cc engines, giving buyers a direct check against the installed clutch. Its listing also names dirt bikes, ATVs and go-karts, including Taotao and Kazuma applications, making tooth count and engine style the key selection points.

The semi-auto designation narrows the intended setup, while the 17T gear separates it from 18-tooth assemblies; checking both helps avoid choosing by engine size alone. CLEO explicitly advises checking pictures and measurements to confirm the application, so compare the listing’s visual details with the existing part before ordering. The stated range covers 50cc–125cc engines in dirt bikes, ATVs and go-karts. No included service hardware is specified in the supplied product details.

Skip it if you need stated clutch measurements or bundled hardware; AuInLand’s 18T assembly lists dimensions and includes replacement hardware.

This is a targeted choice for a 17T semi-auto 50cc–125cc dirt bike, ATV or go-kart application. Use the pictures and measurements to verify the part against your setup, since dimensions and kit contents are not specified here.

Listed on Amazon as: CLEO Clutch Assembly 17 Teeth For Semi Auto 50cc-125cc Engine Dirt Bikes ATV Go-Kart Taotao Kazuma

#3 · Hardware-Included Pick

3. AuInLand 17T Clutch Assembly

• Weight: 1.53 kg

Best for: 17T automatic reverse-engine kit.

Why it ranks #3: This 17T assembly lists fit for most 50cc–125cc vehicles with automatic reverse engines and includes gaskets, bearings, springs, and fasteners.

A 17-tooth drive gear and complete hardware set make this AuInLand clutch a specifically equipped option for automatic reverse engines. It is listed for most 50cc–125cc ATVs, dirt bikes and go-karts, with a stated 4.57-inch outer diameter and 0.68-inch inner-hole diameter for fit checks.

The 17T gear and automatic-engine fit note help distinguish this assembly from manual-style or 18T alternatives. Listed dimensions—the 4.57-inch outer diameter and 0.68-inch inner hole—provide useful checks against the existing clutch. The complete kit includes a gasket, bearings, spring, screws, bolts, washers and spacers, consolidating service hardware. Its applications include common 50cc, 70cc, 90cc, 110cc and 125cc off-road motorcycles, along with ATVs and go-karts.

Skip it if you need an 18T automatic clutch; AuInLand’s 18-tooth assembly is the listed alternative for that gear count.

Choose this for a compatible 17T automatic reverse-engine ATV, dirt bike or go-kart when the stated dimensions match. Its hardware kit supports a more complete service, but the automatic-engine requirement rules out other clutch types.

Listed on Amazon as: Clutch Assembly 17 Teeth Fit For Auto 50cc-125cc Engine Dirt Bikes ATV Go-Kart Taotao Kazuma

#4

4. TRKIMAL 17T Semi Auto Clutch

• Weight: 3.32 lb
• Package Dimensions: 5.94 x 4.53 x 3.39 in

Best for: 17T semi-auto engine replacement.

Why it ranks #4: It identifies a 17T drive gear and semi-automatic fit, with listed engine sizes from 50cc to 125cc; it explicitly excludes manual-style clutches.

TRKIMAL specifies a 17-tooth drive gear for semi-automatic engines, giving owners a concrete match point for 50cc, 110cc and 125cc applications. The listing also names 70cc, 90cc and 135cc engines in its title, with dirt bikes, ATVs, quad bikes and go-karts among the intended vehicle types.

The product’s fit notes distinguish semi-automatic engines from manual-style clutches, making engine type an essential part of selection. Its 17T gear provides a second specific check against the current assembly. The title broadens the stated engine range to 50cc, 70cc, 90cc, 110cc, 125cc and 135cc, while the key fit text calls out 50cc, 110cc and 125cc. Check the type and gear count before ordering; no dimensions or included hardware are stated.

Skip it if you need an automatic-engine kit with stated dimensions and hardware; AuInLand’s 18T assembly lists both for that setup.

This suits owners seeking a 17T semi-auto clutch for a listed dirt bike, ATV, quad or go-kart engine. Match the gear count and engine type carefully; the product notes exclude manual-style clutches and provide no dimensions.

Listed on Amazon as: TRKIMAL Semi Auto Clutch Assembly 17Teeth For 50cc 70cc 90cc 110cc 125cc 135cc Engine Dirt Bikes ATV Quad Go-Kart Taotao Kazuma (17Teeth)

#5

5. hauertzx 17T Clutch Assembly

• Weight: 3.52 lb
• Package Dimensions: 5.39 x 5.39 x 2.56 in

Best for: 17T clutch for broad small-engine range.

Why it ranks #5: Its title lists a 17T assembly for 50cc–135cc engines and several ATV, go-kart, and dirt-bike brands, but the supplied data gives few fit details.

The 17T semi-automatic assembly is listed across 50cc, 70cc, 90cc, 110cc, 125cc and 135cc engines, giving buyers a broad stated displacement range to compare with their vehicle. Its title names ATV, quad, go-kart and dirt-bike uses, as well as several Chinese-brand applications.

A 17-tooth designation makes this assembly a candidate only where the existing setup calls for that gear count; the listed semi-automatic type further narrows the application. Its range spans 50cc to 135cc and specifically includes 70cc and 90cc engines alongside common larger sizes. The title names Roketa, Kazuma, JCL, NST, SUNL and Taotao. The supplied details do not describe material, dimensions or included accessories, so those factors cannot be used here to assess installation or service preparation.

Skip it if you want specified dimensions and listed service hardware; AuInLand’s 18T kit supplies both, but suits automatic engines.

Consider this for a listed 17T semi-automatic ATV, quad, go-kart or dirt-bike application across the stated engine range. Verify that the vehicle uses the same gear count; the supplied details do not provide measurements or accessory contents.

Listed on Amazon as: 17T Semi Automatic Clutch Assembly with Accessories for 50cc 70cc 90cc 110cc 125cc 135cc ATV Quad Go Kart Dirt Bike Engine,Powersports Clutches for Roketa Kazuma JCL NST SUNL Taotao (17T)

#6 · 18T Alternative

6. AuInLand 18T Clutch Assembly

• Weight: 3.47 lb
• Package Dimensions: 5.51 x 5.35 x 2.6 in

Best for: 18T automatic-engine hardware kit.

Why it ranks #6: The 18T gear suits buyers whose existing automatic engine specifically requires 18 teeth; the listing also gives 116 mm outer diameter and hardware.

Its 18-tooth drive gear distinguishes this AuInLand assembly from 17T alternatives and gives automatic-engine owners a precise tooth count to match. The complete kit is listed for most 50cc–125cc motorcycles, ATVs, dirt bikes and go-karts with automatic reverse engines, but not manual-style clutches.

The stated 116 mm outer diameter, 10 mm inner-hole diameter and φ15×φ17 spline size give buyers several dimensions for checking the existing setup. Its kit includes a gasket, bearings, spring, screws, bolts, washers and spacers, which can consolidate hardware for a clutch replacement. Quality iron is described as durable, wear-resistant and quick to dissipate heat. The fit note is specific: use an 18T drive gear and an automatic engine.

Skip it if you need a 17T semi-automatic clutch; CLEO’s 17-tooth assembly is listed for semi-auto 50cc–125cc engines.

Choose this for an automatic reverse-engine vehicle in the listed 50cc–125cc range when its 18T gear and dimensions match. Its hardware assortment is useful for service, but the manual-clutch exclusion is decisive.

Listed on Amazon as: Clutch Assembly 18 Teeth Fits For Auto 50cc-125cc Engine Motorcycle Dirt Bikes ATV Go Kart

#7

7. Muller 120-50 Hydro Clutch

• Weight: 1.1 lb

Best for: Hydraulic-clutch pull-effort reducer.

Why it ranks #7: This is a hydraulic clutch assist for specified Twin Cam and M-Eight models, not a small-engine automatic clutch assembly like the other options.

MULLER’s Easy Clutch is listed to reduce pull effort by 45% on M-Eight models and 35% on Twin Cam models, making easier lever operation its central benefit. It is specifically for those models with hydraulic clutches, rather than a general replacement assembly for small automatic-engine ATVs or go-karts.

The model-specific compatibility limits this choice to Twin Cam and M-Eight models with hydraulic clutches, so its fit is fundamentally different from small-engine semi-automatic assemblies. MULLER states that pull effort drops by 45% on M-Eight and 35% on Twin Cam models, a benefit aimed at reducing effort at the lever. Better clutch response is also claimed. Easy, invisible mounting and zero maintenance are listed, supporting a discreet installation with no maintenance requirement stated for the unit.

Skip it if you need a small-engine 17T semi-auto replacement; 1PZ’s assembly is listed for 50cc–135cc semi-automatic applications.

This fits riders of compatible Twin Cam or M-Eight motorcycles with hydraulic clutches who want reduced lever effort and improved response. Its model-specific application is the boundary: it is not a small-engine automatic clutch assembly.

Listed on Amazon as: 120-50 Hydro Clutch