125CC ATV Motor Engine 4-Stroke Semi-Auto Engine Motor 4-Speed Motorcycle Engine with Reverse Function, Electric Starter Go Kart Engine for Motorcycles, ATVs, Go-Karts | Repair and Installation Guide

Name: 125CC ATV Motor Engine 4-Stroke Semi-Auto Engine Motor 4-Speed Motorcycle Engine with Reverse Function, Electric Starter Go Kart Engine for Motorcycles, ATVs, Go-Karts | Repair and Installation Guide
SKU: C-B0FFN44B4X
Price: 144.00 USD
Availability: InStock

$144.00

SKU: C-B0FFN44B4X Category: Rebuild Kits

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About this item

【Durable and Sturdy】: The engine is equipped with premium aluminum and cast steel, ensuring superior performance and a longer lifespan and adapting to complex environments and conditions.
【Strong Power】: This ATV motor engine boasts a robust 7.64HP horsepower, a displacement of 125cc, and a max rotating speed of 7500RPM, which provides you with strong power and ensures that your drive will be very smooth and powerful.
【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.
【Adjustable Speed】: Its 4-speed manual 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 Operate】: The CDI ignition system (not included) leads to higher energy and ignition efficiency. So you can start the motor engine quickly and safely.
【Easy to Install】: Our ATV motor engine is pre-installed and you only need to spend a little time and effort to complete the remaining parts, enjoying a sense of achievement!

Before you order

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Description

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Brand: BQDRTMZ

Item Weight
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:
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50.16 Pounds
Item model number
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:
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ACYCZYQ3679-MJJ626
Date First Available
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:
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June 26, 2025
Manufacturer
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:
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YENURIOMJJ
ASIN
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:
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B0FFN44B4X
Country of Origin
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:
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China
Best Sellers Rank: #654,595 in Automotive (See Top 100 in Automotive)
- #330 in Powersports Engine Kits

Specification

Engine Type: Single Cylinder, 4 Stroke, Horizontal, Two-stage Transmission

Other Features: 3 Forward Gears and 1 Reverse

Material: Aluminium, Cast Steel

Engine Cooling Type: Air Cooling

Ignition System: CDI (Not Included)

Start Mode: Kick-starter; Electric

Clutch Type: Manual Wet Multi-Disc

Transmission: 4-speed, Semi-Auto

Displacement: 125CC

Minimum No-load Stable Speed: 1400 (1 ± 10%) R / min

Compression Ratio: 8.7:1

Bore Stroke: 54x54mm/2.12×2.12inch

Max Power: 5.8Kw/h

Max Torque: 8.0N-m

Max Rotating Speed: 7500rpm

Horsepower: 7.64HP

Air Inlet and Exhaust Valve Clearance: 0.05 ~ 0.07 mm (Cold State)

Min Fuel Consumption: ≤367g/kW.h

Spark Plug: A7TC

Carburetor Type: PZ19 (Not Included)

Min Stable Idle Speed: 1500r/min±150r/min

Primary Reduction Ratio: 3.722

Transmission Ratio of Each Gear: First Gear: 3.272; Second Gear: 1.938; Third Gear: 1.350; Fourth Gear: 1.043

Lubricant Capacity: 900ml/0.23 Gallons

Lubricant Type: SL10W/40 (Not Included)

Crankshaft Diameter: 1.5cm/0.59inch

Crankshaft Length: 0.4cm/0.15inch

Gasoline Type: ≥ 92 #

Gross Weight: 19.45kg/42.87lbs

Net Weight: 18.15kg/40.01lbs

Product Size: 45x30x25cm/17.71×11.81×9.84inch

Package Size: 51x39x33.5cm/20.07×15.35×13.18inch

Package Included

1xATV Motor Engine

1xGearshift Lever

1xChain Cover

1xIntake Manifold

2xIntake Gaskets

All Accessories for Assembly

Application

This ATV motor engine can be widely used in motorcycles, ATVs, go-karts, tricycles, etc, as long as the crankshaft matches.

Notes

Professional installation is highly recommended.

Product facts

Specifications

Canonical product: MP-US-B0FFN44B4X
Source product ID: B0FFN44B4X
Category: Motorcycle & Atv / Parts / Engine / Rebuild Kits
Available images: 7

No structured vehicle fitment data is available. Compare the listing with the vehicle and existing part before ordering.

Repair scenarios, installation, companion parts, and use outcomes

Buying guidance

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Repair scenario

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Installation notes

Use the listing instructions when present and follow the vehicle service procedure.
Professional installation may be appropriate when the repair requires special tools or calibration.

Companion parts

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Before you buy

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