---
product_id: 549367535
title: "Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)"
brand: "glixal"
price: "¥38974"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/549367535-glixal-gy6-100cc-50mm-complete-big-bore-cylinder-rebuild-kit
store_origin: JP
region: Japan
---

# 18.5/20.5mm oversized valves for superior airflow 69mm big bore cylinder for max displacement DLC coated piston rings for ultra-low friction & durability Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)

**Brand:** glixal
**Price:** ¥38974
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Up Your Ride with Glixal’s Big Bore Brilliance!

## Quick Answers

- **What is this?** Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves) by glixal
- **How much does it cost?** ¥38974 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/549367535-glixal-gy6-100cc-50mm-complete-big-bore-cylinder-rebuild-kit)

## Best For

- glixal enthusiasts

## Why This Product

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

## Key Features

- • **Complete Rebuild Kit:** Includes rocker arms for valve upgrades and a short case gasket, making your rebuild hassle-free and race-ready.
- • **Unleash Maximum Power:** Upgrade to 69mm big bore cylinder for a serious boost in engine displacement and torque.
- • **Breathe Easy with Big Valves:** 18.5/20.5mm valve heads dramatically improve airflow, delivering peak performance on every ride.
- • **Durability Meets Performance:** DLC wear-resistant piston rings reduce friction and protect your cylinder sleeve for longer engine life.
- • **Precision Fit for GY6 Engines:** Designed specifically for 139QMB, 139QMA, and 147QMD engines ensuring seamless installation and optimal compatibility.

## Overview

The Glixal GY6 100cc 50mm Big Bore Cylinder Rebuild Kit is engineered for serious scooter, ATV, and go-kart enthusiasts seeking enhanced engine performance. Featuring a 69mm cylinder, oversized 18.5/20.5mm valves, and DLC-coated piston rings, this kit delivers increased power, improved airflow, and superior durability. Compatible with popular GY6 engine models, it includes all necessary components for a precise and efficient rebuild.

## Description

Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)

## Features

- Use Large Valve Heads to Get More Power for Your GY6 139QMB 139QMA 147QMD Scooter ATV Go Kart Engine!!
- This Big Bore Rebuild Kit Comes with 18.5/20.5mm Large Valve Cylinder Head Assy (Stock is 16/18.5mm).
- Compatible with 69mm Long Valve Style Heads. If your Original Head Has 64mm Valves, Please Must Change Your Rocker Arms with The Ones in Our Kit.
- Glixal Piston Rings: DLC Wear Resistant Coating. This Coating will Also Reduce the Friction Coefficient to Protect the Cylinder Sleeve.
- Please Note: The Engine Side Cover Gasket is for a Short Case Version (8 Bolt).
- Attention: AT marking face to the piston, the 6mm small hole goes up or away from the Motor !!!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Glixal |
| Brand | Glixal |
| Item Weight | 8.34 pounds |
| Package Dimensions | 16.5 x 12.05 x 4.09 inches |
| Item model number | ATMT1-010ML69 |
| Manufacturer Part Number | ATMT1-010ML69 |

## Images

![Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves) - Image 1](https://m.media-amazon.com/images/I/71yGp98-hsL.jpg)

## Frequently Bought Together

- Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)
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**Shop now:** [https://www.desertcart.jp/products/549367535-glixal-gy6-100cc-50mm-complete-big-bore-cylinder-rebuild-kit](https://www.desertcart.jp/products/549367535-glixal-gy6-100cc-50mm-complete-big-bore-cylinder-rebuild-kit)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-06*