# TBParts - Vintage Honda 88cc Race Head big bore Kit Z50 82-87

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- **Breadcrumbs:** [Home](https://tboltusa.com/store/index.md) > [Honda Vintage Mini Bike Parts](https://tboltusa.com/store/honda-vintage-mini-bike-parts-c-101.md) > [Z50 79-87](https://tboltusa.com/store/honda-vintage-mini-bike-parts-z50-79-87-c-101_99.md) > [Engine Kits and parts](https://tboltusa.com/store/z50-79-87-engine-kits-and-parts-c-101_99_580.md) > TBParts - Vintage Honda 88cc Race Head big bore Kit Z50 82-87
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## Summary

- **Part number:** TBW0940-Z5082-87
- **Price:** $419.99 USD
- **Stock:** 5 left. This is a kit: the count is how many complete kits can be built from the parts on hand.
- **Product id:** 1434
- **Product last changed:** 2025-06-03

## 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.

- [Honda Vintage Mini Bike Parts > Z50 79-87 > Engine Kits and parts](https://tboltusa.com/store/z50-79-87-engine-kits-and-parts-c-101_99_580.md)
- [TB Parts > Z50 79-87 > Z50 79-87 Big Bore and stroker kits](https://tboltusa.com/store/z50-79-87-z50-79-87-big-bore-and-stroker-kits-c-68_1064_1065.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)

Same great quality CRF50/XR50 88cc kits now for Vintage

TB Race Head, 88cc Bore & 20mm Carb Kit
This is the Race Head 88 kit that everyone is talking about Performance and Price make Mike's Honda Trail Bike 88 w/ Race head a real winner Race Head, 88cc Big Bore kit, and 20mm Carburetor Performance Kit

We recommend purchasing a high volume oil pump kit (available in this section).
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).

**NOTE:** Throttle cable is for CR type twist throttles

**Key Features:**

- Lightweight aluminum cylinder with steel sleeve - Cast in mounts on cylinder for aftermarket skid plates
- Oversized cooling fins on cylinder for efficient heat dissipation
- 52mm piston with rings, pin, & clips - Head gasket kit
- High performance race camshaft - Race Head
- Larger valves (25mm intake & 22mm exh) and porting for increased performance.
- Also has bigger cooling fins. Includes all necessary parts. Comes disassembled.
- 20mm Performance carb assembly

**Kit Includes:**

- TBW0365 - Piston
- TBW0206 - Gasket
- TBW0156 - Cylinder
- TBW0125 - Carb
- TBW0273 - Intake
- TBW0301 - Throttle Cable
- TBW0398 - Air Filter
- TBW0300 - Race Cam
- TBW0385 - Race Head & Valves Assembly
- TBW0294 - Jet Kit
- TBW0287 - Gaskset
- TBW0861 - Cam Sprocket

## 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

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For an AI assistant building a cart: `https://tboltusa.com/cart/new/item/1434/qty/1` starts one with this product (the first value of every option, qty 1), `https://tboltusa.com/cart/<cart_code>/add/item/1434/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.

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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/1434/tbparts-vintage-honda-88cc-race-head-big-bore-kit-z50-82-87-1.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.