Shopping Cart

Your cart is empty.

Your cart is empty.

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

Free shipping on orders over $29.99

$169.99

$ 72 .99 $72.99

In Stock

1.Size:2-stroke 49cc Bike Engine


About this item

  • 【About Wirings】Five 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 1】Engine 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 2】Idle speed: 1500 r/min±100r/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/min±250 r/min
  • 【Warm Note】Please note that the machine originally has oil, but the machine still needs add oil before it can start. Gasoline and engine oil volume mixing ratio, running-in period 25:1, late running-in period 30:1


Specifications

Material: Iron, Aluminum

Process: Die Casting, Painting

Color: Silver

Engine Type: Parallel 4-Stroke Single-Cylinder Engine

Transmission System: Forward-Neutral-Reverse

Starting Method: Electric Start

Ignition Device: CDI

Cooling Method: Air Cooling

Starter Type: Foot Start

Lubrication Method: Pressure/Splash

Fuel Type: Gasoline

Carburetor: PZ19

Displacement: 125CC

Maximum Power: 5.5KW

Compression Ratio: 9:1

Max. Speed: 7500±375RPM

Idle Speed: 1500±100RPM

Max. Torque: 8.5 N.m

Front Sprocket: 420-17mm-14T

Fuel Tank Capacity: 900ml/0.24gal

Air Filter Diameter: 35mm/1.38in

Cylinder Diameter*Stroke: 52.4*55.5mm/2.06*2.19in

Top Mounting Hole Spacing: 92mm/3.62in

Bottom Mounting Hole Spacing: 82mm/3.23in

Bolt Spacing: 152mm/5.98in

Way of Use: Direct Replacement

Product Size: 48*36*30cm/18.9*14.17*11.81in

Package Size: 50*37.5*32cm/19.69*14.76*12.6in

Gross Weight: 21.95kg/48.39lbs

Net Weight: 21kg/46.3lbs


Package Included

1 * 125CC 4 Stroke Engine Motor

All 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)


Notes

1.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.


Ashli
2025-09-05 11:04:07
Bought this to pair of our sons four wheeler and installed it and it looks great. Great value.
Aaden Marton
2025-08-03 16:51:10
Excellent motor and great customer service!
Mr. T. Bird
2025-05-10 17:55:41
Everything looks good. The plugs that connect to each other The wire colors do not correspond. anyway to get a wiring diagram.?
Pauline and dallas
2025-04-07 16:34:36
We ordered this motor to do a rebuild for the second time me and my boys 3, and 5 years old but right away out of the box we had issues got the motor put together and tried to fire it up but we were not getting spark at all we tried everything even replaced the stator plate spark plug coil and ignition switch then last but not least the cdi and we finally got spark but it still wouldnt start and then i decided to use my old carburetor from a previous motor and two weeks after buying it we finally started the motor and took a drive yesterday afternoon now i will say we did purchase the premium 4 year protection plan but we decided to take the time ourselves and work this brain scratcher out ourselves but iam wanting to have my stator plate and carburetor replaced due to it belonging to my other project bike but this motor was garanteed to start with everything it was shipped with but all in all iam pretty impressed great motor excellent performance now i will say the first time my boys an i built this bike it was stolen from us twice in one week we got it back both times with our own hard work but this bike is a family hobby for me and my growing boys as we are all 3 of us new to the power sports world this being our first bike but second time we built it.
Unknown
2025-03-15 13:30:23
I bought this engine and I put it on the bike. It’s ran good for about 1 hour then i had oil all over the side of it. I sent the product back and never received a refund or replacement. Then I emails them and they told me my package was either lost or destroyed. Now they’re telling me they can try and get me $50 when I paid almost $300. Definitely do not recommend this product.
Michael S.
2025-02-17 13:57:55
Mounted right up to this 2005 pitter. The bike feels more proper cant wait to test it out it feel like it has tons more compression.
Alex m
2025-01-15 18:17:27
I’ve purchased the engine on May got it on the 20th of may, been riding Around in my Apollo Rfz swapped with this engine ever since, it’s currently august 15th and the bike still runs Real strong, Still idles good starts up 1-2 kick with or without Gas, I have an aftermarket 24mm carb on it, pops wheelies Like it’s nothin, Definitely will be buying this engine again 100%
Eric Salvador
2024-12-14 13:05:44
The clutch was sticky at first, until you get it going and shifting through th gears, then it’s works fine. Been having an issue with the kickstarter though, it goes into like a neutral for a few kicks, then gabs and fires rights up first kick (not grinding noise) Kind of weird.
Recommended Products