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125CC 4 Stroke Engine Motor, Single Cylinder Air-Cooled Motor Engine with CDI Manual Clutch Wiring Harness Carburetor Chain Sprocket Complete Engine Kit Starter for Go Kart Pit Dirt Bike ATV Buggy

  • Based on 4 reviews
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Availability: In Stock.
Fulfilled by YULNEKNEU

Arrives May 13 – May 15
Order within 12 hours and 45 minutes
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Features

  • Powerful Engine: The 4-stroke engine can provide higher intake and exhaust efficiency, saving energy and fuel (Min. Fuel Consumption: 367g/kW.h). It can provide stronger power (Max. Power: 6.5 kW/7500r/min375r/min) during driving and ensure that your drive will be very smooth and powerful.
  • Durable Design: Designed with premium aluminium and cast steel, this engine has high hardness, wear resistance, and corrosion resistance. So it can adapt to complex environments and conditions.
  • Effective Cooling System: By adopting an air cooling system, the temperature of the engine can be quickly reduced, effectively preventing overheating and ensuring smooth and long-lasting driving The engine features a CDI ignition system, which leads to higher energy and ignition efficiency. So you can start the engine quickly and safely.
  • Precise Control: Its 4-speed manual clutch transmission provides you with high-precision gear shifting control, so it allows you to easily adapt to various changes. It makes your driving experience more exciting under different road conditions.
  • Easy to Maintain: The single cylinder has simple structure, light weight and small size, which is easy to clean stains, therefore its maintenance is uncomplicated.

Description

DescriptionIf you are a driving enthusiast who loves freedom, pursues speed and passion, then our CRF50 125CC engine will be your ideal choice. With its excellent performance and stable power output, it makes your driving more enjoyable and comfortable. Buying CRF50 125CC engine means choosing a high- quality, high-performance, and safe driving experience. ApplicationThis engine fits for such motorcycles as HONDA CRF50/CRF70/XR50/XR70/Z50/Z50R/CT70 Mini Trail/Z50/Mini Trail Monkey/XL70 ST70/QA50/QR50/CL70/SL70/70 Passport/ST 90K2/ST 90K1/CS 90/SL 90/ZB 50. SpecificationEngine Type: Single Cylinder, 4 StrokeMaterial: Aluminium, Cast SteelIgnition System: CDIStart Mode: Kick- starterClutch: Wet Multi-plateTransmission: 4-speed, Manual ClutchDisplacement: 125CCCompression Ratio: 9.0:1Max Power: 6.5 kW/7500r/min±375r/minRated Power: 5.6 kW/7500r/min±375r/minMax. Torque: 8.0 Nm/5000r/min±250r/minIdle Speed: 1500r/min±100r/minMin. Fuel Consumption: ≤367g/kW.hSpark Plug: A7TCCarburetor Type: PZ16JPrimary Reduction Ratio: 3.722Gear Ratio: 2.833/1.706/1.238/0.958Lubricant Capacity: 900mlLubricant: SAE15W/40-SE, 4-stroke Gasoline Engine OilEngine Dimensions: 42.52723cm/16.7310.639in Package Size: 48.53735.2cm/19.114.5713.86in (Outer); 4631.525.5cm/18.112.410in (Inner)Net Weight: 19.2kg/42.33lbsGross Weight: 21.3kg/46.96lbs Package Included1 CRF50 125CC Engine1 Kick Starter Lever1 Gear Shift Lever1 Carburetor1 Intake Manifold1 CDI1 Sprocket Cover3 Intake GasketsSome Screws for Assembly

Brand: gaebeoih


Model Name: 125CC 4 Stroke Engine Motor


Material: Aluminium, Cast Steel


Item Weight: 42.33 Pounds


Manufacturer: YULNEKNEU_US


Product Dimensions ‏ : ‎ 16.73 x 10.63 x 9 inches; 42.33 Pounds


Item model number ‏ : ‎ cashcbj


Date First Available ‏ : ‎ September 9, 2025


Manufacturer ‏ : ‎ YULNEKNEU_US


Best Sellers Rank: #176,194 in Automotive (See Top 100 in Automotive) #37 in Powersports Engine Kits


#37 in Powersports Engine Kits:


Customer Reviews: 5.0 5.0 out of 5 stars 4 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 13 – May 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Fast shipping
This 125cc engine truly breathes life into my kart! Power delivery is incredibly smooth and robust, and the four-stroke design proves far more fuel-efficient and quieter than two-strokes. What truly impressed me is its starting performance—the CDI ignition system is exceptionally reliable, firing up reliably with just one or two pulls of the starter cord. The manual clutch engagement is crisp and precise, delivering a satisfyingly responsive feel. For this price point, the performance exceeds expectations! ... show more
Reviewed in the United States on October 5, 2025 by Michael Perdue

  • Very easy to use.
The perfect replacement engine! My old off-road motorcycle has finally been reborn. The mounting holes on this engine are perfectly standard, and the included sprocket size fits perfectly. The kit comes with everything from the carburetor to the clutch wiring harness—you can install it directly with almost no additional purchases needed. The air-cooling system provides excellent heat dissipation during operation, and there's no power loss even after extended rides. ... show more
Reviewed in the United States on October 5, 2025 by Will Coates

  • Strongly recommended
As a DIY enthusiast, the installation process was a real pleasure. The engine is solidly built with all connections clearly labeled. The carburetor came factory-set fairly accurately and only needed minor tweaks to reach peak performance. The engine runs exceptionally smoothly, revs up seamlessly, and the distinctive single-cylinder sound is truly thrilling. The beach buggy I built with it has become the kids' favorite—it's got more than enough power. ... show more
Reviewed in the United States on October 5, 2025 by Christina Cross

  • Highly satisfied
If you're searching for a power solution for your small ATV or go-kart, this is the perfect choice. The 125cc displacement delivers ample torque for off-road adventures and hill climbs. The complete kit eliminates the hassle of piecing together parts. The combination of CDI ignition and manual clutch makes driving a joy—reliable and controllable. This product offers exceptional value for money and comes highly recommended! ... show more
Reviewed in the United States on October 5, 2025 by perugu ravikrishna

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