---
product_id: 548658590
title: "125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor"
brand: "liyuanjun"
price: "7054 DH"
currency: MAD
in_stock: true
reviews_count: 8
category: "Liyuanjun"
url: https://www.desertcart.ma/products/548658590-125cc-4-stroke-engine-motor-kit-single-cylinder-air-cooled
store_origin: MA
region: Morocco
---

# 6.5 kW max power output 4-speed manual clutch control 125cc displacement power 125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor

**Brand:** liyuanjun
**Price:** 7054 DH
**Availability:** ✅ In Stock

## Summary

> ⚡ Unleash the power of precision – your dirt bike’s new heartbeat!

## Quick Answers

- **What is this?** 125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor by liyuanjun
- **How much does it cost?** 7054 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/548658590-125cc-4-stroke-engine-motor-kit-single-cylinder-air-cooled)

## Best For

- liyuanjun enthusiasts

## Why This Product

- Trusted liyuanjun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultimate Control:** Experience full command with a 4-speed manual clutch transmission, perfect for mastering diverse terrains.
- • **Optimized Efficiency:** PZ22 carburetor and CDI ignition system finely tune fuel and spark for enhanced throttle response and fuel economy.
- • **Precision Power Delivery:** Kickstart your ride with a robust 125cc 4-stroke engine delivering 6.5 kW of smooth, reliable power.
- • **Plug & Play Compatibility:** Direct bolt-in fit for popular Honda mini dirt bikes like CRF50, XR50, Z50R, and more—upgrade without hassle.
- • **Cool & Durable Performance:** Air-cooled design prevents overheating, ensuring your engine stays cool during extended adventures.

## Overview

The LIYUANJUN 125CC 4-Stroke Engine Motor Kit is a high-performance, air-cooled single-cylinder engine designed for Honda mini dirt bikes. Featuring a 4-speed manual clutch, PZ22 carburetor, and CDI ignition, it delivers 6.5 kW of power with optimized fuel efficiency. Its direct bolt-in compatibility and durable air-cooling system make it the go-to upgrade for riders seeking reliable, customizable control and smooth rides.

## Description

Buy LIYUANJUN 125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor: Rebuild Kits - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: The kids love it - 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
Review: Runs like a champ! - This rating should be lower but the actual engine runs great, fit well and the price is incredible! Reason I would have rated lower is the CDI it came with did not work, luckily the old one did. The pipe from cylinder to carb had a hole casted in it rendering it useless, again, the old one worked. This could be good or bad but since I hate wiring, it was bad to me... It comes with at least twice as many wires as I needed. Again, this could be a positive for some.

## Features

- 【What You Will Get】Here 1x 125cc 4 stroke engine, 1x kick starter lever, 1x gear shift lever, 1x carburetor, 1x intake manifold, 1x cdi, 2x intake gaskets are included in the package. The carefully calibrated PZ22 carburetor optimizes the air-fuel mixture, enhancing fuel efficiency and providing a consistent and responsive throttle response, resulting you in a smooth and enjoyable ride.
- 【Main Parameters】Fuel Consumption: ≤367g/kw.h; Displacement: 125cc; Start Mode: Kick starter; Lubrication: SAE15W/40-SE, 4-stroke gasoline engine oil; Compression ratio: 9.0:1 Transmission: 4-speed, Manual clutch; Primary Reduction Ratio: 3.722; Clutch: Wet multi-plate; Max Power: 6.5 kW/7500r/min±375r/min; Spark Plug: A7TC; Carburetor Type: PZ22
- 【Compatible With】This engine fits for HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50. Please note this is not a guarantee, if you are unsure, please ask your local dealer.
- 【Precise Control】The engine's 4-speed, manual clutch transmission provides you with precise control over gear changes, allowing you to adapt to various road conditions and terrain, resulting in a more engaging and customized riding experience. Manual transmissions tend to be less expensive to manufacture and maintain than automatic transmissions, which can lead to cost savings for you.
- 【CDI Ignition& Air Cooling】This 125cc engine motor adopts CDI ignition which optimizes the timing and intensity of sparks and enhances fuel efficiency. The engine's air-cooled design ensures a cool performance. The air-cooling system efficiently dissipates heat, preventing overheating during prolonged rides and maintaining optimal engine temperature for a smooth and enduring adventure.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CD2F712S |
| Best Sellers Rank | #64,638 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Engine Kits |
| Brand | LIYUANJUN |
| Customer Reviews | 4.2 4.2 out of 5 stars (81) |
| Date First Available | July 28, 2023 |
| Exterior | 125CC 4-Stroke Engine Motor |
| Item model number | 125CC 4-Stroke Engine Motor |
| Manufacturer | LIYUANJUN |
| Manufacturer Part Number | AC-YCZYQ-1495 |
| Model | 125CC 4-Stroke Engine Motor |

## Product Details

- **Brand:** LIYUANJUN
- **Manufacturer:** LIYUANJUN
- **Model Name:** 125CC 4-Stroke Engine Motor

## Images

![125CC 4-Stroke Engine Motor Kit, Single Cylinder Air-Cooled Motor Engine for Honda CRF50 XR50 CRF70 Z50R QR50 Dirt Pit Bike, Engine Kit with Manual Clutch and PZ22 Carburetor - Image 1](https://m.media-amazon.com/images/I/61wm1k3A-WL.jpg)

## Questions & Answers

**Q: Is it fix Honda atc70?**
A: Dear customer, this product is suitable for honda atc70, hope this can help you!

**Q: Whats the wiring diagram?**
A: Dear customer, 
It is our pleasure to answer your questions. At present, we have updated the wiring diagram picture in real time, and you can see the product wiring diagram. Hope this helps you! 
If you have any problems, contact me freely at any time, we will try our best to solve your problems. 
Good wishes!

## Customer Reviews

### ⭐⭐⭐⭐⭐ The kids love it
*by L***A on March 20, 2025*

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

### ⭐⭐⭐⭐ Runs like a champ!
*by M***0 on December 4, 2025*

This rating should be lower but the actual engine runs great, fit well and the price is incredible! Reason I would have rated lower is the CDI it came with did not work, luckily the old one did. The pipe from cylinder to carb had a hole casted in it rendering it useless, again, the old one worked. This could be good or bad but since I hate wiring, it was bad to me... It comes with at least twice as many wires as I needed. Again, this could be a positive for some.

### ⭐⭐⭐⭐⭐ Easy
*by K***A on August 16, 2025*

Kids love being able to ride their bike again! Came as it was described good quality at a great price. Super easy install!

## Frequently Bought Together

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-23*