# Lifan 125cc or 140cc Head 27/23 > This is a plain-text (markdown) copy of a page on tboltusa.com, made for AI assistants. People see the same page at the HTML link below. - **Breadcrumbs:** [Home](https://tboltusa.com/store/index.md) > [Pit Bike Engine Parts](https://tboltusa.com/store/pit-bike-engine-parts-c-51.md) > [Cylinder Heads & Parts](https://tboltusa.com/store/pit-bike-engine-parts-cylinder-heads-parts-c-51_110.md) > Lifan 125cc or 140cc Head 27/23 - **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/lifan-125cc-or-140cc-head-2723-p-9231.html) - **Markdown:** [this page as markdown](https://tboltusa.com/store/lifan-125cc-or-140cc-head-2723-p-9231.md) - **Generated:** 2026-11-05 06:58 EST - **Site guide for AI assistants:** [llms.txt](https://tboltusa.com/llms.txt) - **Your list:** To list everything you have looked at in one page, with current prices and stock, add ids to this address (comma separated, up to 20 of each): `https://tboltusa.com/store/seen.md?p=9231` All prices are in US dollars (USD). Shipping and any tax are worked out at checkout. ## Summary - **Part number:** TRC-9125 - **Price:** $139.99 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=9231&stockcheck=true) ([Contact us](https://tboltusa.com/store/contact_us.md)) - **Product id:** 9231 - **Product last changed:** 2024-02-04 ## 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 > Cylinder Heads & Parts](https://tboltusa.com/store/pit-bike-engine-parts-cylinder-heads-parts-c-51_110.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) This is the Lifan Big Valve head Can be used on GPX 124cc Engines as in Pitster pro ,thumpstar ect 27mm intake valve and 23mm exh valve complete and assembled cam included with .265'' lift Intake port size is 24mm Exhaust port size is 33mm using this head and the tb146cc bore kit on your Pitster will produce a really good power increase **Cam sprocket cover,Cam cover and Tappet covers included color may vary** **Cam sprocket included 32T 3 bolt** Can be used as replacement head for Lifan 140cc , Lifan 150cc & Lifan 120cc 52.5 bore x 55.5 stroke engines **Please tell us what engine you have when ordering** Due to stock levels we may sub for equal YX product the head could be black or silver. When running TB300 Race cam a simple far end bearing swap will be needed (no special tools required) Does not come with cam cover bolt ## 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/9231/lifan-125cc-or-140cc-head-2723-1.png) ## 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.