# TBparts - 114cc Big Bore Kit with V2 Race Head and Nibbi 24mm Carb Kit for TRX90 Utilizing Stock Air Box > 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) > [TB Parts](https://tboltusa.com/store/tb-parts-c-68.md) > [TRX90](https://tboltusa.com/store/tb-parts-trx90-c-68_808.md) > TBparts - 114cc Big Bore Kit with V2 Race Head and Nibbi 24mm Carb Kit for TRX90 Utilizing Stock Air Box - **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/tbparts-114cc-big-bore-kit-with-v2-race-head-and-nibbi-24mm-carb-kit-for-trx90-utilizing-stock-air-box-p-12547.html) - **Markdown:** [this page as markdown](https://tboltusa.com/store/tbparts-114cc-big-bore-kit-with-v2-race-head-and-nibbi-24mm-carb-kit-for-trx90-utilizing-stock-air-box-p-12547.md) - **Generated:** 2026-11-03 05:56 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=12547` All prices are in US dollars (USD). Shipping and any tax are worked out at checkout. ## Summary - **Part number:** TRC-2276 - **Price:** $749.99 USD - **Stock:** 4 left. This is a kit: the count is how many complete kits can be built from the parts on hand. - **Product id:** 12547 - **Product last changed:** 2026-01-20 ## 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 > TRX90](https://tboltusa.com/store/tb-parts-trx90-c-68_808.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 Roller Rocker Race Head V2 114cc Big bore kit. Highest performance race head on the market with full parts support in stock. Nibbi 22mm carb kit for TRX90 utilizing the stock air box. This will make a huge difference in performance over your stock setup and is a very quick and easy upgrade. **Key Features:** - Roller Rocker Arms exactly like the V2 head for the KLX110 - 28.5mm intake Valve - 23.5mm Exhaust Valve - 5mm Valve Stem - 23mm Exhaust port - Matching High Compression Piston - Head kits include all hardware - 54mm Aluminum Cylinder - 54mm piston with rings, pin, & clips - High performance race camshaft (for the Race Head only) - Head gasket kit - 24mm Nibbi Performance carb #40 pilot #105 main factory installed - Additional jets for tuning (Main jets - #100 #102 #108 / Pilot jet - #35) - CNC billet aluminum Intake Manifold , hard-anodized red, includes gaskets, hardware, and heat stop/spacer **Recommended:** - 2 size clutch tool - WHS-2274 - TBparts oil cooler for V2 heads - TBW9187 **Application:** - TRX 90 - All years **Kit Includes:** - TBW0750 - V2 Race head - TBW0821 - V2 Head bolt kit - TBW0752 - V2 Cam - TBW0754 - V2 head cover set - TBW0788 - Piston - TBW0859 - Head gasket kit - TBW0721 - Cylinder - TBW0857 - Throttle cable - TBW0133 - Dual Feed Petcock - TBW1951 - CNC manifold - TBW1952 - Rubber boot for air box - NB-PE24YJ - 24mm Nibbi carb **Note:** TRX90 will not need High volume oil pump AND now this kit is set up for drop on install with no case mods with trx90 See the Performance Info section for additional information on our performance parts. ## More notes the store shows with this product Assembly info SEE TECH DATA LINK [tboltusa.com/store/tech.php](https://tboltusa.com/store/tech.php?pID=216/TBparts+V2+Honda+TBW0750+and+China+TBW0751+head+TECH)? ## 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. - [TBparts V2 Honda TBW0750 and China TBW0751 head TECH](https://tboltusa.com/store/tbparts-v2-honda-tbw0750-and-china-tbw0751-head-tech-216.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 For a person: open [TBparts - 114cc Big Bore Kit with V2 Race Head and Nibbi 24mm Carb Kit for TRX90 Utilizing Stock Air Box](https://tboltusa.com/store/tbparts-114cc-big-bore-kit-with-v2-race-head-and-nibbi-24mm-carb-kit-for-trx90-utilizing-stock-air-box-p-12547.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. For an AI assistant building a cart: `https://tboltusa.com/cart/new/item/12547/qty/1` starts one with this product (the first value of every option, qty 1), `https://tboltusa.com/cart//add/item/12547/qty/1` adds it to a cart you already started, and `https://tboltusa.com/cart//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. Or give the person one link that fills their own cart when they open it (a public cart link, safe to share; the first value of every option, qty 1): [Put TBparts - 114cc Big Bore Kit with V2 Race Head and Nibbi 24mm Carb Kit for TRX90 Utilizing Stock Air Box in my cart](https://tboltusa.com/cart/open/item/12547/qty/1) 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/12547/tbparts-114cc-big-bore-kit-with-v2-race-head-and-nibbi-24mm-carb-kit-for-trx90-u-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.