---
product_id: 72134848
title: "80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped with 139QMA 139QMB Engine"
brand: "chanoc"
price: "€ 88.74"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.hr/products/72134848-80cc-big-bore-47mm-cylinder-rebuild-kit-for-gy6-49cc
store_origin: HR
region: Croatia
---

# 47mm Bore 80cc Upgrade 13mm Pin 80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped with 139QMA 139QMB Engine

**Brand:** chanoc
**Price:** € 88.74
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Adventure with Every Ride!

## Quick Answers

- **What is this?** 80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped with 139QMA 139QMB Engine by chanoc
- **How much does it cost?** € 88.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/72134848-80cc-big-bore-47mm-cylinder-rebuild-kit-for-gy6-49cc)

## Best For

- chanoc enthusiasts

## Why This Product

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

## Key Features

- • **Unleash Your Ride:** Transform your 50cc engine into a powerful 80cc powerhouse!
- • **Climb with Confidence:** Experience effortless hill climbing like never before.
- • **Durability Guaranteed:** Enjoy peace of mind with a 12-month warranty.
- • **Precision Engineering:** Crafted for GY6 139QMA and 139QMB engines for a perfect fit.
- • **Customer-Centric Support:** We're here for you—reach out anytime for assistance!

## Overview

The 80cc Big Bore 47mm Cylinder Rebuild Kit is designed specifically for GY6 49cc and 50cc ATV scooters and mopeds equipped with 139QMA and 139QMB engines. This kit enhances your vehicle's performance by upgrading it from 50cc to 80cc, featuring a 47mm inner diameter cylinder bore and a 13mm outer diameter piston pin. With a 12-month warranty and dedicated customer support, this kit is your ticket to a more powerful and reliable ride.

## Description

80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped with 139QMA 139QMB Engine

## Features

- Big bore kit for 4 stroke GY6 50 139qma and 139qmb engine
- Your vehicle will get more power with this item,easier to climb hill than ever before
- Inner Diameter of Cylinder bore: 47mm,Outer Diameter of Piston Pin: 13mm
- Upgrade your engine from 50cc to 80cc
- 12 months warranty guaranteed, please feel free to message us via desertcart system email for any concern

## Images

![80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped with 139QMA 139QMB Engine - Image 1](https://m.media-amazon.com/images/I/71sgB+HkL9L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Order a cam chain tensioner gasket!
  

*by A***R on Reviewed in the United States on June 23, 2018*

This kit fit my little Chinese scooter very well, slid together with just the right amount of resistance, and looks completely stock from the outside.There are no instructions with the kit, only parts, but it does include intake and exhaust studs and exhaust nuts (not needed for install, but good to have for spares!). I got 3/4 through reassembly and discovered that the kit doesn’t include a cam chain tensioner gasket, so be sure to order one (about $1) or go to the local scooter shop like I did ($5!).I don’t know how it runs yet, I’m on my way home with the gasket,  but I’ll update once I’m riding again!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    best kit of all
  

*by Ꮳ***Ꮝ on Reviewed in the United States on April 7, 2019*

Out of other BBK kit's i have installed this one on 2 mopeds it is the best in quality casting,fitment and gaskets.The stud bolts for intake and exhaust that comes with this kit if using your original head remove the old studs and replace with the studs that come with this kit i use a drop of mid grade blue lock tight on all my scooter bolts retightening all bolts and nuts during break in exhaust bolts especially.Install a new NGK spark plug while you have head off making sure it is tight.Best valve gap is .004 intake and exhaust.A ring compressor is not needed if rings are installed correctly the rings will compress going into jug using your fingers to compress the first 2 rings"I use axle or marine grease on the new jug and piston lightly to prevent first starts being metal to metal.To have the best results install new exhaust,intake gaskets and a new intake manifold.Installing a #90 main jet with throttle needle clip set 2nd down from top.

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    Good Kit, but some parts missing
  

*by I***A on Reviewed in the United States on September 6, 2019*

The piston and rings were fine. Wrist pin was missing from the kit as well as some other bolts and nuts, so I just used the old ones. The cylinder had some insignificant damage due to the improper shipping packaging. I would ask for a replacement, but they ran out of stock.

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**Shop now:** [https://www.desertcart.hr/products/72134848-80cc-big-bore-47mm-cylinder-rebuild-kit-for-gy6-49cc](https://www.desertcart.hr/products/72134848-80cc-big-bore-47mm-cylinder-rebuild-kit-for-gy6-49cc)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-12*