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LIYUANJUN

125CC Engine Motor, 4-Stroke Semi Auto Engine for Go Kart ATV Quad Bike Buggy CDI/Air Cooling System Single-Cylinder with Reverse and 3 Forward Electrical Start

  • Based on 66 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Jirestoo
Arrives Wednesday, May 6
Order within 11 hours and 26 minutes
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Size: 125 cc 4-Stroke Engine Motor


Features

  • About WiringsFive wires (plug) is for gear indicator; yellow wire is for storage battery; pink (or yellow) wire is for storage battery; black & red wire is for signal trigger;green wire is for grounding; blue & white is for trigger coil.
  • Compatible with This 125cc engine motor is suitable for pit bike, dirt bike, buggy, pocket rocket, go-karts, atvs, track bikes, quad and so on. It fits for Atomik, for Pitpro, for TDR, for Xmoto, for Trooper, for Motox, for Trojan, for Blitz, for Raider, for Zongshen, for Chongqing, for Loncin, for Ducar and more.(For the reference)
  • Parameters 1Engine Size: 125cc; Gear System: 3 Forward; Neutral; Reverse; Type: Horizontal, Single-Cylinder, 4-Stroke, Air-Cooled; Start Method: Electrical Start; Bore X Stroke: 52.4 55.5 Mm, 119.7 Ml; Top Engine Mount: 92mm; Bottom Engine Mount: 82mm
  • Parameters 2Idle speed: 1500 r/min100r/min; Front sprocket: 428 - 14T; Ignition: CDI; Air Filter: 35mm; Carburetor: PZ19; Lubrication: Pressure/splash; Oil capacity: 900ml/0.23gal; Maximum torque/ rpm: 8.5 N.m/5000r/min250 r/min
  • Friendly ReminderPlease note that the machine contains test oil at the factory, but you still need to add engine oil before starting it. You need to add 4 tons of pure engine oil, and you do not need to change to other types of oil during the break-in period. The break-in period is generally around 20 days.

Description

SpecificationsMaterial: Iron, AluminumProcess: Die Casting, PaintingColor: SilverEngine Type: Parallel 4-Stroke Single-Cylinder EngineTransmission System: Forward-Neutral-ReverseStarting Method: Electric StartIgnition Device: CDICooling Method: Air CoolingStarter Type: Foot StartLubrication Method: Pressure/SplashFuel Type: GasolineCarburetor: PZ19Displacement: 125CCMaximum Power: 5.5KWCompression Ratio: 9:1Max. Speed: 7500±375RPMIdle Speed: 1500±100RPMMax. Torque: 8.5 N.mFront Sprocket: 420-17mm-14TFuel Tank Capacity: 900ml/0.24galAir Filter Diameter: 35mm/1.38inCylinder DiameterStroke: 52.455.5mm/2.062.19inTop Mounting Hole Spacing: 92mm/3.62inBottom Mounting Hole Spacing: 82mm/3.23inBolt Spacing: 152mm/5.98inWay of Use: Direct Replacement Product Size: 483630cm/18.914.1711.81inPackage Size: 5037.532cm/19.6914.7612.6inGross Weight: 21.95kg/48.39lbsNet Weight: 21kg/46.3lbs Package Included1 125CC 4 Stroke Engine MotorAll Accessories for Assembly Fits (As a Reference)For Atomik, for Pitpro, for TDR, for Hummer, for Orion, for Xmoto, Lei, for Dmx, for Swd, for Tomahawk, for Go Kart, for Quad, for Dirt Bike, for ATV, for Pit Bike, for Buggy, for Rocket Car (For 125cc Engine Size) Notes1.We strongly recommend professional installation. 2.Please double-check compatibility before purchasing to ensure proper fit.3.Please allow for slight color differences caused by shooting light and errors caused by manual measurement, and make sure you don't mind before ordering.

Brand: LIYUANJUN


Horsepower: 5.8 Kilowatts


Manufacturer: LIYUANJUN


Brand Name: LIYUANJUN


Manufacturer: LIYUANJUN


Horsepower: 5.8 Kilowatts


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 6

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

    • The kids love it
Size: 125 cc 4-Stroke Engine Motor
Great little engine! Fast shipping! Got this as a replacement for one of the kids little off-brand atvs. Bolted right in. Sounds great! East to install. There was no instructions for the wiring harness so there was a little trial and error hooking it up but works great. Starter solenoid died after cranking it over less than 3 times trying to get it started for the first time but luckily I had the one off the old harness. Get a better air filter. The one in my kit was just foam and already ripped and crumpled. Oh and the shift lever is unusable in my application. I honestly don't know what it would actually work in. Lol Overall is it perfect? Nope. But I still have it 5 starts because, the shipping was really fast. Faster then expected by 3 days! Engine is nice. Sounds good. Direct bolt in replacement. Some of the accessories that came in the kit were a little chincy and unusable. Overall it's a great deal ... show more
Reviewed in the United States on March 20, 2025 by laura
    • Good upgrade from a 107cc
Size: 125 cc 4-Stroke Engine Motor
Runs like a champ but wiring sucked
Reviewed in the United States on February 15, 2026 by Jose herrera
    • Good price works great
Size: 125 cc 4-Stroke Engine Motor
I would have give them a five out of five but we got no instructions or diagram on how to do the wiring other than that the motor worked really good we got it when they said they would ship it and even got it at a decent price
Reviewed in the United States on August 26, 2024 by brandy wren
    • You get what you pay for.
Size: 125 cc 4-Stroke Engine Motor
Keep your old motor, you'll need the spare parts. So far I've used the old oil pan (new one damaged in shipping) and the starter solenoid (burned up before the engine started the very first time). Also the shift pattern is backwards for most. Down to upshift and vice versa. I believe that's typical for put bikes, but weird for a quad. Motor runs ok so far, shifting is rough but may be just breaking in. You get what you pay for though and this rig was very reasonably priced. I would suggest shipping insurance though if you don't have a spare motor lying around. ... show more
Reviewed in the United States on May 25, 2025 by Noah
    • Easy
Size: 125 cc 4-Stroke Engine Motor
Kids love being able to ride their bike again! Came as it was described good quality at a great price. Super easy install!
Reviewed in the United States on August 16, 2025 by Kyrsha
    • Junk
Size: 125 cc 4-Stroke Engine Motor
The media could not be loaded. Worked great for a hour now it just smokes out the vent tube when you try to start it junk do not buy I contacted them and they want a video of what its doing and no way to send them 1 but here it is junk
Reviewed in the United States on March 24, 2026 by Lance bordelon
    • Wiring instructions are vague.
Size: 125 cc 4-Stroke Engine Motor
Shipping was quick but they broke an ear off the starter and broke the housing off the carb maybe just my experience. I was able to fix the motor and buy a new carb, the wiring diagram was vague and took several hours of testing to complete. Engine ran good once repaired
Reviewed in the United States on March 26, 2026 by Experiment 125
    • Fast shipping. Worked nice.
Size: 125 cc 4-Stroke Engine Motor
Fast shipping only took two days was very pleased about that. And came with everything to replace my blown up go kart motor. Couple things missing but not bad for the money.
Reviewed in the United States on April 15, 2026 by James work

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