# TBparts - Race Cam, 88cc Bore & 20mm Carb Kit CRF70 XR70

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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) > [Chinese 50-110cc Performance](https://tboltusa.com/store/pit-bike-engine-parts-chinese-50-110cc-performance-c-51_37.md) > TBparts - Race Cam, 88cc Bore & 20mm Carb Kit CRF70 XR70
- **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/tbparts-race-cam-88cc-bore-20mm-carb-kit-crf70-xr70-p-760.html)
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All prices are in US dollars (USD). Shipping and any tax are worked out at checkout.

## Summary

- **Part number:** TBW0931
- **Price:** $269.99 USD
- **Stock:** Out of stock. It cannot be added to the cart right now. A person can ask to be emailed when it is back: [Get on the List](https://tboltusa.com/store/contact_us.php?pid=760&stockcheck=true) ([Contact us](https://tboltusa.com/store/contact_us.md)) This is a kit: the count is how many complete kits can be built from the parts on hand.
- **Product id:** 760
- **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.

- [Pit Bike Engine Parts > Chinese 50-110cc Performance](https://tboltusa.com/store/pit-bike-engine-parts-chinese-50-110cc-performance-c-51_37.md)
- [TB Parts > CRF70 XR70](https://tboltusa.com/store/tb-parts-crf70-xr70-c-68_77.md)
- [TB Parts > Chinese Engines](https://tboltusa.com/store/tb-parts-chinese-engines-c-68_70.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)

Upgrade your Honda 70 with this substantial setup! It will provide everything needed to make your stock engine nearly double the stock power output. We recommend purchasing a high volume oil pump kit (available in this section).

**Note: NOT FOR CRF50 / XR50 with STOCK HEAD**

**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

**Application:**

- XR70 - All years
- CRF70 - All years
- China 50-70cc

**Kit Includes:**

- TBW0365 - Piston
- TBW0206 - Gasket
- TBW0156 - Cylinder
- TBW0125 - Carb
- TBW0273 - Intake
- TBW0301 - Throttle cable
- TBW0398 - Air filter
- TBW0189 - Camshaft
- TBW0294 - Jet kit

**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).

## 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

This item is out of stock, so it cannot go in the cart now (see Stock above).

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

## Photos

- [Photo 1](https://tboltusa.com/store/img/p/760/tbparts-race-cam-88cc-bore-20mm-carb-kit-crf70-xr70-1.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.