# TBParts - 20mm Carb Kit for Z50 XR-CRF70 and XR-CRF50 with Race Head

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All prices are in US dollars (USD). Shipping and any tax are worked out at checkout.

## Summary

- **Part number:** TBW0957
- **Price:** $119.99 USD
- **Stock:** 8 left. This is a kit: the count is how many complete kits can be built from the parts on hand.
- **Product id:** 575
- **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 > CT70 > Carbs & Kits](https://tboltusa.com/store/ct70-carbs-kits-c-101_91_558.md)
- [Honda Vintage Mini Bike Parts > Z50 79-87 > Carbs & Kits](https://tboltusa.com/store/z50-79-87-carbs-kits-c-101_99_576.md)
- [Honda Vintage Mini Bike Parts > Z50 K3-78 > Carbs & Kits](https://tboltusa.com/store/z50-k3-78-carbs-kits-c-101_215_577.md)
- [Japanese Mini Bike Parts > CRF50 Z50 & XR50 > Carb kits](https://tboltusa.com/store/crf50-z50-xr50-carb-kits-c-100_122_125.md)
- [Japanese Mini Bike Parts > CRF70 and XR70 > Carb Kits](https://tboltusa.com/store/crf70-and-xr70-carb-kits-c-100_36_490.md)
- [Mini Quad ATC ATV Parts > ATC 70](https://tboltusa.com/store/mini-quad-atc-atv-parts-atc-70-c-65_530.md)
- [Mini Quad ATC ATV Parts > TRX 70](https://tboltusa.com/store/mini-quad-atc-atv-parts-trx-70-c-65_532.md)
- [Pit Bike Engine Parts > Carb Kits & Throttle Cables](https://tboltusa.com/store/pit-bike-engine-parts-carb-kits-throttle-cables-c-51_38.md)
- [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 > ATC 70](https://tboltusa.com/store/tb-parts-atc-70-c-68_529.md)
- [TB Parts > CRF50 XR50 Z50 88-Up > CRF50 XR50 Carb Kits and parts](https://tboltusa.com/store/crf50-xr50-z50-88-up-crf50-xr50-carb-kits-and-parts-c-68_73_1046.md)
- [TB Parts > CRF70 XR70](https://tboltusa.com/store/tb-parts-crf70-xr70-c-68_77.md)
- [TB Parts > CT70 > CT70 Carb Kits and parts](https://tboltusa.com/store/ct70-ct70-carb-kits-and-parts-c-68_75_1040.md)
- [TB Parts > SL70 XL70](https://tboltusa.com/store/tb-parts-sl70-xl70-c-68_76.md)
- [TB Parts > TRX 70](https://tboltusa.com/store/tb-parts-trx-70-c-68_531.md)
- [TB Parts > Z50 79-87 > Z50 79-87 Carb kits and Parts](https://tboltusa.com/store/z50-79-87-z50-79-87-carb-kits-and-parts-c-68_1064_1067.md)
- [TB Parts > Z50 88-99 > Z50 88-99 Carb Kits and parts](https://tboltusa.com/store/z50-88-99-z50-88-99-carb-kits-and-parts-c-68_1056_1058.md)
- [TB Parts > Z50 K0-78 > Z50 K0-78 Carb Kits and parts](https://tboltusa.com/store/z50-k0-78-z50-k0-78-carb-kits-and-parts-c-68_1063_1072.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)

TB 20mm Performance Carb Kit - All Honda 50/70 88cc Kit

Exceeds OEM Standard equipment

Z50 CRF70 and CRF50 XR50 with Race Head

Kit includes the carb, intake, heatstop, gaskets, mounting bolts/wrench, air filter and throttle cable

Throttle cable is provided that allows for more adjustments and will work on wider selection of throttles

We highly recommend this carb kit for use with bore kits (88cc).

**Key Features:**

- Kit includes everything for the carb setup
- Works great with race head applications
- Affordable, simple upgrade while maintaining reliability

**Recommended:**

- Sta-bil fuel stabilizer - W-57-1129
- TB 12 way rotating spacer 20mm - TBW0900
- Pre-filter - WHS-1664
- Uni foam filter spray - W-82-1000
- Main jet kit - TBW0294
- Pilot jet kit - TBW0478
- (Larger) Pilot jet kit - TBW0798

**Application:**

- Honda Z50 - 1988-1999 with 88cc kit
- Honda XR50 - All Years with 88cc kit and Race Head
- Honda CRF50 - All Years with 88cc kit and Race Head
- Honda CRF70
- Honda XR70
- Honda TRX70
- Honda ATC70
- Honda CT70
- Honda CL70
- Honda SL70
- Honda XL70

**Kit Includes:**

- TBW0125 - 20mm Carb
- TBW0273 - Intake Kit for Race Head
- TBW0301 - Throttle Cable
- TBW0398 - Air Filter

## 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 [TBParts - 20mm Carb Kit for Z50 XR-CRF70 and XR-CRF50 with Race Head](https://tboltusa.com/store/tbparts-20mm-carb-kit-for-z50-xr-crf70-and-xr-crf50-with-race-head-p-575.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.

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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/575/tbparts-20mm-carb-kit-for-z50-xr-crf70-and-xr-crf50-with-race-head-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.