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X-PRO

X-PRO 125cc 4-Stroke ATV Gokart Engine with Automatic Transmission with Reverse, Electric Start

Based on 84 reviews
Condition: New
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$388.95

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027

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Availability: In Stock.
Fulfilled by XPROUSA
Arrives Nov 12 – Nov 16
Order within 5 hours and 56 minutes

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At a glance

Condition
New
Model
308-999010
Weight
65 lb
Material
Aluminum
Size
Large
Theme
Vehicle

Features 3

  • Engine Type: Single Cylinder, 4-Stroke, 2-Valve Gears: Automatic with reverse engine.
  • Automatic Transmission w/Reverse, electric start for 50cc 90cc 110cc 125cc Go Kart ATV
  • This engine assembly comes with Intake Pipe, Drive Sprocket, Sprocket cover & Spark Plug, but doesn't come with Carburetor, Battery, CDI, Voltage Regulator, Ignition Coil etc. Best of all, it comes with High quality aluminum cylinder head and iron cylinder body.

Description

ATV Go kart 125cc 4-stroke Engine with Automatic Transmission w/Reverse, Electric Start Engine Model: 308-999038 Ignition Method: CDI Engine Type: Single Cylinder, 4-Stroke, 2-Valve Lubrication: Pressure/splash Cooling System: Air Cooled Fuel Supply: Carburetor Atomization Horsepower: 7.64HP/7000-8000Rpm (5.7KW/7000-8000Rpm) Starter: Electric Starter Max.Torque: 8.0N.m/5000-6000rpm Transmission: Auto Transmission with Reverse Min.Stable Idle Speed: 1350-1650r/min Clutch: Automatic Multi-plate Wet Clutch Min.Fuel Consumption: 9.65oz/HP.h (367g/Kw.h) Cylinder Diameter: 2.06" (52.4mm) Carburetor Model: PZ22 Piston Stroke: 1.95" (49.5mm) Carburetor Type: Plunger type carburetor Bore & Stroke: 2.13" x 1.95"(54mm x 49.5mm) Spark Plug Model: A7TC Cylinder Working Volume: 0.03 Gallon (120ml) Fuel No.: >= 87 Compression Ratio: 9.0:1 Ignition Type: CFW Lubrication Capacity: 0.20 Gallon (900ml)

Specs 12

Brand Name X-PRO
Unit Count 1 Count
Number of Items 1
UPC 611536184388
Number of Packs 1
Manufacturer X-PRO
Manufacturer Part Number 308-999010
Manufacturer recommended age 0 - 10 years

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 12 – Nov 16

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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  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Fast
Bolted right up on my 125cc Chinese atv. Perfect fit no modifications or anything bolts right up runs good
Reviewed in the United States on September 25, 2026 by jarrod
Runs and shifts great.
Got this for a customers sun-L go-cart. Some things to remember. It comes “bare” ie;no carburetor,ignition coil and cdi. It does come with oil,shift linkage arm,carb adaptor elbow,electric starter and a new spark plug installed. It was pretty much plug and play and fired up quickly after adjusting the carb. Note: the shifter mechanism was”stiff” at first but losened up after use ... show more
Reviewed in the United States on May 5, 2020 by Mary White
Great engine
Had problems with the motor at first but seller quickly corrected the problem and now it runs great
Reviewed in the United States on April 19, 2021 by Nicole
Sounds like gravel
Sounds like gravel is running through it. I wouldn’t pay 400 for this again
Reviewed in the United States on September 4, 2026 by Nash stone
Great small Atv engine
This was installed on a 2018 Tao Tao/ colester 125cc Atv /quad. Also installed on a 2020 Rival mudhawk 120cc Atv The quick fitting did not work but I used wire connectors ….. two set of wires : 3 wire set is for clutch/gear lights Forward-neutral- reverse 5 wire set - 3 from stator , one to solenoid, and one for the ground Two bolts to the frame then install chain and it’s good to go Yes it’s transported in shipping oil, you must drain it and use recommended oil, I used small engine oil and never had problem, I change it every 6 months due to usage ... show more
Reviewed in the United States on July 9, 2025 by Trey Grant
Heavy crack or snap while starting .
The engine has a heavy vibration you can feel through your hands, feet and butt. Something is very unbalanced inside the engine. It also has a really loud snap or cracking noise in the motor while starting, sometimes only once while starting, sometimes lots of loud snaps and cracks while starting. Having a discussion with sellers representative to try and resolve the problems.I will update review afterwards. ... show more
Reviewed in the United States on July 21, 2022 by Gary Brass
No power
Motor has no power, gutless. Company sent new clutch, but that didn’t change the performance. I should not have to work on a brand new motor.
Reviewed in the United States on February 8, 2025 by Steve H.
Great replacement engine
Amazing engine looks good and runs great came with oil in it
Reviewed in the United States on March 11, 2026 by joshua gerving
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