125cc 4-stroke Engine with Automatic Transmission w/Reverse, Electric Start
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fully assembled and pdi

125cc 4-stroke Auto Transmission w/Reverse Engine Motor, Electric Start for 50cc 90cc 110cc 125cc Go Karts & ATVs, Free Shipping


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Sale Price:
$329.95  $239.95
Buy With Cashier's Check Or Money Order:
$230.35 (Save $9.60)
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  • Product Description

    Key Features

    • Brand New High Quality Engine, 4 Stroke, Automatic Transmission w/Reverse, electric start. It fits most China made 50cc 90cc 110cc 125cc ATVs and Go Karts.
    • Compatible Vehicles:125cc all size ATVs, 125cc all size Go Karts
    • Compatible Models: Coolster, Taotao, Roketa, Kazuma,Terminator, Lynx, Redcat, Tank and more.
    • Aluminum Cylinder Head and Iron Cylinder Body: Improves the heat dissipation capability, cuts the weight and increases the torque of the engine.
    • Built-in Reverse: Makes it easier to control your bike for moving forward and backward via operating the gear change pedal. Great features include user-friendly operation, high reliability, convenient installation and maintenance, etc.
    • Crank Shaft: The engine is low speed with high torque and has large diameter bearings for crankshaft connecting rod, increasing the reliability of the bearings.
    • Air-cooled Engine: There are metal fins covering the outside of the cylinders and the heat generated by the engine is released directly into the air when the cooling fan blows air over fins. It has the advantages of simple structure, light weight, wide adaptability to climate change, rapid start up and no need of radiator.
    • High-flow Oil Pump: Reduces the wear of friction pairs and prolongs the engine life.
    • Lubricating Oil Strainer: Helps removing solid contamination from lubricating oil, largely reducing the wear of friction pairs and prolonging the engine service life.
    • PLEASE NOTE: Please measure the physical size to be sure you get the correct one.


      Engine Model 308-999010 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/7500±500Rpm (5.7KW/7500±500Rpm) Starter Electric Starter
      Max. Torque 8.0N.m/5500±500rpm Transmission Auto Transmission with Reverse
      Min. Stable Idle Speed 1500±150r/min Clutch Automatic Multi-plate Wet Clutch
      Min. Fuel Consumption 9.65oz/HP.h (367g/Kw.h) Cylinder Diameter 2.13" (54mm)
      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
      Lubrication Model SF15W/40-SE Ignition Type CFW
      Lubrication Capacity 0.20 Gallon (900ml)


      The quality engine system production complies with the requirements of ISO9001:2000. All the engines have passed the 200-hour enhanced durability bench test and the 20000 km road test. The engine has the similar performance, facility and reliability as many brand engines, such as Honda, Yamaha, Kawasaki and so on. It also obtained the DOC authorization. Please do not compare our engines to other low quality engines, we only sell high quality engines.

      All engines have the identification, gears and oil labels. You can purchase with confidence.

      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.

      Material: High quality aluminum cylinder head and iron cylinder body

      Transportation: The oil in the engine will be drained out and the engine will be repackaged to avoid leaking before shipping. We package the engines with five-layer anti-earthquake carton boxes to ensure the items arrive in perfect condition.

    Usage Tips

    • Do start the engine in an open place to let the exhaust gas gets full emission.
    • For Automatic Transmission Engines, please don't start is at reverse. For Semi-auto and Manual Transmission Engines, please do start at Neutral.
    • Check lubricating oil level and fuel level regularly. Make sure they are sufficient and not leaked.
    • Please do not accelerate until it has warmed up for 1-3 minutes if cooler start engine.
    • All new engines need a initial run-in time. Because the surface of the parts is not that smooth, they need a time to run-in to have the parts get smooth and work together better. The initial run-in should be at least 500KM. During the initial run-in, please avoid full-open throttle and don't start it over 80 percent of the top speed. Make sure to clear all fuel and change new when initial run-in over. Be strictly obey this will prolong the engine service life and has it working in good condition.
    Customers who bought this product also purchased
    Customer Reviews (30) Click here to write a review
      Average Rating out of 30 voters 5 of 5 Stars!
    Reviewer Product Review
    John L

    5 of 5 Stars! 01/27/2018
    A buddy at work gave me this broke down pocket rocker could not get it to run no mater what we tried so I bought this one. It Fit right in hooked up easy and wow is it quick. My friend weighs 220 pounds and accelerated up a steep hill with the slightest of ease. My 80lb son is going to absolutely love this bike when I'm finished playing with it. Ha ha.
    mitchell M

    5 of 5 Stars! 01/10/2018
    Super easy to install and the electronics were pretty easy to figure out . I put it in my bike witch only lasted me 5 months .... I had no experience doing this before and took my time it still only took 4 hrs
    Jacquie R

    5 of 5 Stars! 01/05/2018
    I got this engine for my ssr 125 rebuild and i put it in a started up first kick. this is a very well built engine for the price.
    Wendy Z

    5 of 5 Stars! 12/06/2017
    installed very easy.kicks and runs perfect thanks.lots of low end power it climbs great i installed this motor myself in 45 min.
    Marcia S
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 10/15/2017
    great price,exact fit.had to change stator housing for exact wiring,not a problem.started right up.fast delivery,no damage.runs strong,still in break period.thank you powersportsmax!!
    deandre W
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 08/26/2017
    the engine all the way from California came right on time great job Powersports fedex you guys rock can't waite to install it best way to indentify the engine look at the kick start location on the transmission
    Carole W
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 08/16/2017
    replaced a bad motor with this one. it arrived on time and undamaged.im still breaking it in but it seems to run well.
    Mei H
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 08/02/2017
    Matt C
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 07/23/2017
    I am very happy with this item thank you very much and I will recommend you to Facebook and other friends
    George S
    Ownership: more than 1 years
    This user purchased this item from PowersportsMax.com
    5 of 5 Stars! 07/20/2017
    Really great..engine is smooth and fast! No problems at all...Hail Tmotorsports! So far its been very reliable...cant complain...seller is great too!
    See all 30 customer reviews 
    Making buying decisions based solely on these reviews is not recommended.
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    Average Rating:

    5 of 5 Stars!

    What customer said:
    installed very easy.kicks and runs perfect thanks.lots of low end power it climbs great i installed this motor myself in 45 min. ..
    Read all Reviews