---
product_id: 428302359
title: "4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK"
brand: "dnysysj"
price: "S$582"
currency: SGD
in_stock: true
reviews_count: 8
url: https://www.desertcart.sg/products/428302359-4-stroke-140cc-dirt-bike-motorcycle-complete-engine-kit-engine
store_origin: SG
region: Singapore
---

# Complete engine kit with all essentials 140cc 4-stroke powerhouse Fits top mini dirt bike models 4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK

**Brand:** dnysysj
**Price:** S$582
**Availability:** ✅ In Stock

## Summary

> 🏁 Unleash the mini beast within – power, precision, and pure adrenaline!

## Quick Answers

- **What is this?** 4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK by dnysysj
- **How much does it cost?** S$582 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/428302359-4-stroke-140cc-dirt-bike-motorcycle-complete-engine-kit-engine)

## Best For

- dnysysj enthusiasts

## Why This Product

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

## Key Features

- • **All-in-One Engine Kit:** Includes carburetor, CDI, manifold, gear shift & kick starter levers—everything to get you rolling fast.
- • **Power Meets Precision:** 8kW max power and 9.5N.M torque deliver a thrilling ride with smooth 4-speed manual clutch control.
- • **Kickstart Your Adventure:** Reliable kick starter ensures first-kick ignition every time, no battery needed.
- • **Plug & Play Compatibility:** Designed to fit popular mini dirt bikes like CRF50, XR70, Z50R, and more for seamless upgrades.
- • **Built for Millennial Trailblazers:** Upgrade your pit bike or go-kart with a high-performance engine that turns heads and boosts fun.

## Overview

This 140cc single-cylinder, horizontal 4-stroke engine kit delivers 8kW power and 9.5N.M torque with a reliable kick starter and 4-speed manual clutch. Compatible with popular mini dirt bike models like Honda CRF50/70 and XR50/70, it includes all essential components—carburetor, CDI, manifold, and levers—making it a complete upgrade solution for enthusiasts seeking enhanced performance and durability.

## Description

140cc Engine Carburetor CDI Kick Starter Lever Gear Shift Lever Manifold SetSpecifications:Type: Single-cylinder, horizontal, 4-strokeGear: 1N234Ignition: CDIDisplacement: 140ccBore x Stroke: 55mm x 59mmMax. Power & Corresponding Speed: 8kw(7500±375)Max. Torque & Corresponding Speed: 9.5N.M(5000±250)Start Mode: Kick starterCompression: 9.0:1Engine Oil: 900ml, 15W/40-SE, 4 strokeOil Gears: 4 Speed Manual Clutch, 1N234Sprocket: 15T 428 17mmFits (For the reference):· For HON-DA 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 /If you are unsure, please ask your local dealer.Package includes:1 x 140CC ENGINE1 x Kick Starter Lever1 x Gear Shift Lever1 x Manifold set Package1 x Carburetor1 x CDI

Review: Great price - I bought this as a replacement engine for a small go kart. It was easy to install and runs great. You'll have to buy a carb, air filter, and gas tank if you don't already have one
Review: Runs amazing. Starts first kick every kick. - Bought as an upgrade for my125 xpro hawk. Brought it to 140. Super impressed! Roughly 60% more torque than the 125! Made my pit bike waaayy more fun. The seller was prompt at sending a wiring diagram to get me up and running. Highly recommended! Cannot go wrong for the money.

## Features

- 【140cc Engine】Type: Single-cylinder, horizontal, 4-stroke; Gear: 1N234; Ignition: CDI; Displacement: 140cc; Bore x Stroke: 55mm x 59mm;Max. Power & Corresponding Speed: 8kw(7500±375)； Max. Torque & Corresponding Speed: 9.5N.M(5000±250)
- 【Specifications】Start Mode: Kick starter; Compression: 9.0:1; Engine Oil: 900ml, 15W/40-SE, 4 stroke; Oil gears: 4 speed manual clutch, 1n234; Sprocket: 15T 428 17mm
- 【Package Includes】1 x 140CC ENGINE; 1 x Kick Starter Lever; 1 x Gear Shift Lever; 1 x Manifold set Package; 1x Carburetor; 1*CDI
- 【Fits (For the reference)】For HON-DA 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
- 【Widely Used】Widely used in cycling, it can be used for bicycles, motorcycles, models, skateboards, etc. High quality, powerful, and excellent bicycle engine and motor accessories.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09W9LVDN7 |
| Best Sellers Rank | #1,314,127 in Automotive ( See Top 100 in Automotive ) #670 in Powersports Engine Kits |
| Brand Name | DNYSYSJ |
| Customer Reviews | 3.7 out of 5 stars 59 Reviews |
| Manufacturer | DNYSYSJ |

## Images

![4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK - Image 1](https://m.media-amazon.com/images/I/71vVCd7JURL.jpg)
![4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK - Image 2](https://m.media-amazon.com/images/I/61sglKfyYaL.jpg)
![4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK - Image 3](https://m.media-amazon.com/images/I/81kg0MZIe3L.jpg)
![4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK - Image 4](https://m.media-amazon.com/images/I/61vzguKzCvL.jpg)
![4 Stroke 140cc Dirt Bike Motorcycle Complete Engine Kit, Engine Motor Carburetor Single Cylinder CDI Kick Starter Lever Gear Shift Lever Manifold Set for CRF50 CRF70 XR50 XR70 Z50R Z50 CT70 USA STOCK - Image 5](https://m.media-amazon.com/images/I/71DybeziYZL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Can this be used on a shaft driven quad?**
A: Yes, It can

**Q: What pitch and tooth count is the sprocket?**
A: Sprocket Model: 428-14T

**Q: Can you send me the wiring diagram for the 125**
A: Thank you for your question!
Please contact me by email
Thank you.

**Q: this come with the exhaust?**
A: Hi, no exhaust pipe

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great price
*by J***N on February 9, 2025*

I bought this as a replacement engine for a small go kart. It was easy to install and runs great. You'll have to buy a carb, air filter, and gas tank if you don't already have one

### ⭐⭐⭐⭐⭐ Runs amazing. Starts first kick every kick.
*by C***Y on April 14, 2024*

Bought as an upgrade for my125 xpro hawk. Brought it to 140. Super impressed! Roughly 60% more torque than the 125! Made my pit bike waaayy more fun. The seller was prompt at sending a wiring diagram to get me up and running. Highly recommended! Cannot go wrong for the money.

### ⭐ Works but not as described. Do not recommend
*by J***N on April 29, 2024*

Shipping was fast but damage did happen. Some oil leaked out,a wire was cut and the chain cover was crushed and cracked. The chain cover doesnt even fit. Had to be modified to fit. Motor is not the same as what I wanted or have. The shift pattern is even different. Its 5 down instead of 1 down 4 up. The pic was the same but what I received is different. Even the jug bolts a smaller so im not even sure this is a 200. Only thing I can say is make sure your getting the right product.

## Frequently Bought Together

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-01*