---
product_id: 83969824
title: "JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50"
brand: "jdmspeed"
price: "AR$208032"
currency: ARS
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.ar/products/83969824-jdmspeed-new-cylinder-piston-gasket-40cc-big-bore-top-end
store_origin: AR
region: Argentina
---

# Precision Fit for Yamaha QT50 & PW50 Complete Top End Kit Included 40cc Big Bore Power Upgrade JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50

**Brand:** jdmspeed
**Price:** AR$208032
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Up Your Classic Yamaha Ride with JDMSPEED Precision!

## Quick Answers

- **What is this?** JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50 by jdmspeed
- **How much does it cost?** AR$208032 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/83969824-jdmspeed-new-cylinder-piston-gasket-40cc-big-bore-top-end)

## Best For

- jdmspeed enthusiasts

## Why This Product

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

## Key Features

- • **Durability Meets Precision:** Painted exterior and quality components ensure long-lasting performance and a sleek finish under the hood.
- • **All-in-One Top End Solution:** Includes cylinder, piston, gaskets, rings, spark plug, and hardware—everything you need for a seamless upgrade.
- • **Boost Your Ride's Heartbeat:** Unlock enhanced 40cc engine performance with this big bore kit designed for serious power gains.
- • **Tailored for Yamaha Legends:** Perfectly engineered to fit Yamaha QT50 (1979-1987) and PW50 (1981-2009) models—no guesswork, just pure compatibility.
- • **Easy Installation, Instant Impact:** Comes with all necessary studs, nuts, and clips for a hassle-free upgrade that gets you back on the trail faster.

## Overview

The JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit is a comprehensive upgrade package designed to boost the performance of Yamaha QT50 (1979-1987) and PW50 (1981-2009) motorcycles. Weighing just over 5 pounds and featuring a painted exterior, this kit includes all essential components—cylinder, piston, gaskets, rings, spark plug, and hardware—ensuring a perfect fit and durable, high-performance enhancement for your bike’s engine.

## Description

Full description not available

## Features

- 40cc Big Bore Kit
- Includes 1x Cylinder,2x Gaskets,1x Piston,1x Piston Pin,2x Piston Rings,1x Sleeve Bearing,2x Cir-clips,4x Head Cylinder Studs,4x Stud Nuts,1x Spark Plug
- Replacement For Yamaha PW50 1981-2009
- Replacement For Yamaha QT50 1979-1987
- Please make sure to check fitment below!!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | JDMSPEED |
| Brand | JDMSPEED |
| Item Weight | 5.15 pounds |
| Product Dimensions | 8.27 x 5.91 x 5.91 inches |
| Country of Origin | China |
| Item model number | CPGPW50 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | CPGPW50 |

## Images

![JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50 - Image 1](https://m.media-amazon.com/images/I/71K0l+sRUwL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Was sceptical  but worked out great!
*by K***R on October 25, 2019*

No damage! Everything fit well. Went together smooth. Bike fired up on second kick! Gotta love it when it all works out. Give it a try you might get lucky like me!

### ⭐ Poor quality control
*by B***. on January 7, 2024*

No thought or care when packaging. Head gasket was bent and dented due to way was packaged as well as the piston rings. Sent back and exchanged and next set was the same if not worse. Once installed with set that didn’t look wrecked once all back together bike only has 50psi of compression and won’t even start. This kit is complete trash

### ⭐⭐⭐ Poor packaging
*by M***K on March 8, 2024*

The cylinder and piston quality seems fine for this little 50. However, the head and gaskets were damaged due to poor packaging. I expect almost all available replacement parts I’ll have this same issue. Looks to be from original manufacturer.

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**Shop now:** [https://www.desertcart.com.ar/products/83969824-jdmspeed-new-cylinder-piston-gasket-40cc-big-bore-top-end](https://www.desertcart.com.ar/products/83969824-jdmspeed-new-cylinder-piston-gasket-40cc-big-bore-top-end)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-08*