---
product_id: 20448607
title: "50 Caliber Racing 88cc Stage 1 Big Bore Top End Kit Compatible with 1992-up Z50R, 2000+ XR50R and CRF50 [4446]"
brand: "50 caliber racing"
price: "129678 Ft"
currency: HUF
in_stock: true
reviews_count: 1
url: https://www.desertcart.hu/products/20448607-50-caliber-racing-88cc-stage-1-big-bore-top-end
store_origin: HU
region: Hungary
---

# Lightweight aluminum with steel sleeve 88cc high-performance bore Complete gasket installation kit 50 Caliber Racing 88cc Stage 1 Big Bore Top End Kit Compatible with 1992-up Z50R, 2000+ XR50R and CRF50 [4446]

**Brand:** 50 caliber racing
**Price:** 129678 Ft
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your pit bike, dominate the track! ⚡

## Quick Answers

- **What is this?** 50 Caliber Racing 88cc Stage 1 Big Bore Top End Kit Compatible with 1992-up Z50R, 2000+ XR50R and CRF50 [4446] by 50 caliber racing
- **How much does it cost?** 129678 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/20448607-50-caliber-racing-88cc-stage-1-big-bore-top-end)

## Best For

- 50 caliber racing enthusiasts

## Why This Product

- Trusted 50 caliber racing brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power Boosted 88cc Bore:** Unlock serious pit bike performance with a 52mm high-compression piston.
- • **Universal Compatibility:** Fits 1992+ Z50R, 2000+ XR50R & CRF50 models—one kit, endless possibilities.
- • **Durable Lightweight Design:** Aluminum cylinder with steel sleeve balances strength and weight for peak agility.
- • **All-Inclusive Installation Kit:** Everything you need—gaskets, piston, clips—ready for a smooth upgrade.
- • **Engineered for Heat Efficiency:** Oversized cooling fins keep your ride cool under pressure.

## Overview

The 50 Caliber Racing 88cc Stage 1 Big Bore Top End Kit is a precision-engineered upgrade designed for 1992 and newer Z50R, XR50R, and CRF50 pit bikes. Featuring a lightweight aluminum cylinder with a durable steel sleeve, a high-compression 52mm piston, and all necessary gaskets, this kit delivers a noticeable power increase while maintaining reliability and efficient heat dissipation. Ideal for riders seeking a cost-effective performance boost with straightforward installation.

## Description

50 Caliber Racing Stage 1 88cc Big Bore kit (52mm bore) for Z50 (1988-1999), XR and XR50 / CRF 50 (2000-Present) Our 50 Caliber Racing Stage 1 Big Bore Kits are top quality and come with everything you need to finish the job. This is a great way to pump up your Z50, XR50 or CRF50. This kit is recommended for those who don't want to spend a fortune but still want to see a nice power increase over the stock engine. It can be installed by anyone with basic mechanical skills who isn't afraid to turn some nuts and bolts. Includes: - Lightweight aluminum cylinder with steel sleeve - Cast in mounts on cylinder for aftermarket skid plates - Oversized cooling fins on cylinder for efficient heat dissipation - High compression 52mm piston with rings, pin, & clips (can still run pump gas) - Head gasket kit includes all gasket needed to install big bore kit COMPATIBLE WITH: - Z50 (1988-1999) - XR50 (2000-Present) - CRF50 (2000-Present) *High volume oil pump is recommended, not included in this kit

## Features

- 88cc Stage 1 Big bore kit
- Compatible with 1992-up Z50, XR50 & CRF50 pit bikes
- Includes all gaskets needed to install
- Lightweight aluminum cylinder with steel sleeve

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | 50 Caliber Racing |
| Brand | 50 Caliber Racing |
| Item Weight | 3 pounds |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 50 Cal Big Bore Kit Stage 1 [4446] |

## Images

![50 Caliber Racing 88cc Stage 1 Big Bore Top End Kit Compatible with 1992-up Z50R, 2000+ XR50R and CRF50 [4446] - Image 1](https://m.media-amazon.com/images/I/71uaMRGlbFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Five Stars
  

*by C***N on Reviewed in Canada on August 6, 2016*

Fast shipping and a good quality parts

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**Shop now:** [https://www.desertcart.hu/products/20448607-50-caliber-racing-88cc-stage-1-big-bore-top-end](https://www.desertcart.hu/products/20448607-50-caliber-racing-88cc-stage-1-big-bore-top-end)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-16*