# TBparts - V2 Race Head 57mm Bore Kit For Lifan - 14mm Pin

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

## Summary

- **Part number:** TBW9226
- **Price:** $599.99 USD (before options)
- **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=3532&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:** 3532
- **Product last changed:** 2026-01-04

## Options

This product has options. Pick one value for every option. A value marked +$X adds that amount to the price; -$X takes it off.

### Cam Sprocket

- 28 Tooth TBW0861: no price change: `choice/122-842`
- 32 Tooth TBW0414: no price change: `choice/122-843`

## 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.

- [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)

Finally a race head big bore kit for Lifan engines with 14mm wrist pin and 69mm tall cylinders !!

**Kit Includes:**

- TBW0751 - V2 roller rocker race head
- TBW0821 - Bolt kit
- TBW0752 - Camshaft
- TBW0754 - Head cover set
- TBW0861 or TBW0414 - Cam sprocket 28 tooth or 32T respectively **(SEE NOTE)**
- TBW0824 - Piston kit
- TBW0862 - Gasket set
- TBW1608 - 57mm bore x 69mm tall steel cylinder

This cylinder has been tested and works properly on Lifan 125 engines.
See Works - Lifan V2 Performance 138cc Semi-Auto Engine TRC-1449

**Note:**

\1. Make sure your engine has a 69mm tall cylinder before ordering

SEE TECH LINK:
[tboltusa.com/store/tech.php](https://tboltusa.com/store/tech.php?pID=74/Pit+Bike+Cylinder+sizing)

\2. We recommend you test fit the cylinder. The best way to do this is to initially test fit the cylinder without the piston installed at all.

SEE STUD PATTERN TECH LINK:
[tboltusa.com/store/tech.php](https://tboltusa.com/store/tech.php?pID=220/Stud+Pattern+for+TBparts+57mm+x+69mm+tall+cylinder+TBW1608)

\3. Test fit the piston **WITHOUT** the rings on the connecting rod with the cylinder installed and check the deck height to make sure the piston does not stick out of the cylinder at top dead center.

\4. Double check everything with this advanced engine build TECH LINK:

[tboltusa.com/store/tech.php](https://tboltusa.com/store/tech.php?pID=108/Advanced+Engine+Build+Checking+Valve+to+Piston+clearance)

## Tech articles for this product

The TBolt USA Tech Database is the store's free online library of pit bike technical info. The articles below are linked from this product's own page.

- [Pit Bike Cylinder sizing](https://tboltusa.com/store/pit-bike-cylinder-sizing-tech-74.md)
- [Advanced Engine Build Checking Valve to Piston clearance](https://tboltusa.com/store/advanced-engine-build-checking-valve-to-piston-clearance-tech-108.md)
- [Stud Pattern for TBparts 57mm x 69mm tall cylinder TBW1608](https://tboltusa.com/store/stud-pattern-for-tbparts-57mm-69mm-tall-cylinder-tbw1608-tech-220.md)

## 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/3532/tbparts-v2-race-head-57mm-bore-kit-for-lifan-14mm-pin-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.