# GPX & YX 140cc Top End Kit

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- **Breadcrumbs:** [Home](https://tboltusa.com/store/index.md) > [Pit Bike Engine Parts](https://tboltusa.com/store/pit-bike-engine-parts-c-51.md) > [GPX YX 124 & 140 Parts and Kits](https://tboltusa.com/store/pit-bike-engine-parts-gpx-yx-124-140-parts-and-kits-c-51_29.md) > GPX & YX 140cc Top End Kit
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All prices are in US dollars (USD). Shipping and any tax are worked out at checkout.

## Summary

- **Part number:** WHS-1353
- **Price:** $292.50 USD
- **Stock:** 1 left.
- **Product id:** 1000
- **Product last changed:** 2025-04-23

## What it fits

The store lists a part under each bike or engine model it is meant for (the categories below) and may name models in the description. Do not assume it fits a bike or engine that is not named here; ask the store first.

- [Pit Bike Engine Parts > GPX YX 124 & 140 Parts and Kits](https://tboltusa.com/store/pit-bike-engine-parts-gpx-yx-124-140-parts-and-kits-c-51_29.md)

Where a fitment line says "All", it means all years of the model named on that line, not all bikes.

## Description (the store's own text)

GPX & YX 140cc top end replacement kit.

**Kit Includes:**

- 56mm piston - TRC-0097
- Head and base gaskets
- Cylinder (78mm tall) - TRC-0999
- 27/23 valve cylinder head - TRC-0492

**Application:**

- Piranha 140cc
- Pitster Pro 140cc
- Evos 140cc
- GPX 140cc

**Upgrade Applications (Must Check Cylinder OD 60mm for Clearance):**

- Pitster Pro 125
- GPX 124cc
- THUMPSTAR 124cc
- BRAND X MINI 125
- UPC 125
- EVOS
- KRP
- OGM/YX 140 (not steel Cylinder lifan type)
- GPX 140
- Pitster pro X2 or X4 140cc

**OD of cylinder skirt is 60mm (Please make sure you have clearence or you will need to case bore)**

**DOES NOT INCLUDE CAM SPROCKET**
**YX 140 Cam sprocket 3 bolt 32T**
**Part No: TRC-1644**

## Shipping and returns

- Flat rate shipping is $8 for parts orders under $75 and free for most parts orders over $75, within the continental 48 states. Heavy items (engines, complete bikes, suspension) are excluded.
- Full shipping policy: [Shipping policies](https://tboltusa.com/store/shipping-policies-i-6.md)
- Returns: the store's own policy page says how returns, exchanges and cancellations work. Please read it before buying: [Returns, Exchanges and Cancellations](https://tboltusa.com/store/returns-exchanges-and-cancellations-i-11.md) The page begins: "All products returned to T Bolt USA must be reviewed and approved."

## How to buy

For a person: open [GPX & YX 140cc Top End Kit](https://tboltusa.com/store/gpx-yx-140cc-top-end-kit-p-1000.html), choose any options, press "Add to Cart", then check out from the cart. Payment is only ever entered by the person, on tboltusa.com's own checkout pages.

For an AI assistant building a cart: `https://tboltusa.com/cart/new/item/1000/qty/1` starts one with this product (the first value of every option, qty 1), `https://tboltusa.com/cart/<cart_code>/add/item/1000/qty/1` adds it to a cart you already started, and `https://tboltusa.com/cart/<cart_code>/zip/<ZIP>` gives the shipping options to a US ZIP code. They answer JSON: give your customer the newest `cart_link`, a public cart link, safe to share.

Or give the person one link that fills their own cart when they open it (a public cart link, safe to share; the first value of every option, qty 1): [Put GPX & YX 140cc Top End Kit in my cart](https://tboltusa.com/cart/open/item/1000/qty/1)

Payment: all major credit cards, PayPal, Apple Pay and Google Pay. Money orders by arrangement.

Cart: [Shopping cart](https://tboltusa.com/store/shopping_cart.php)

## Photos

- [Photo 1](https://tboltusa.com/store/img/p/1000/gpx-yx-140cc-top-end-kit-1.jpg)

## Support

Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online [Pit Bike Technical Info Database](https://tboltusa.com/store/tbolt-usa-pit-bike-minimoto-technical-info-database-tech-15.md)!

We have all necessary support parts on hand.

*Most* orders ship same, or next business day, unless otherwise noted above.