# TBParts - 143cc Big Bore Kit DRZ110 - KLX110 - Z125 > 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) > [Japanese Mini Bike Parts](https://tboltusa.com/store/japanese-mini-bike-parts-c-100.md) > [KLX 110 & DRZ 110](https://tboltusa.com/store/japanese-mini-bike-parts-klx-110-drz-110-c-100_123.md) > [Big Bore & Engine Kits](https://tboltusa.com/store/klx-110-drz-110-big-bore-engine-kits-c-100_123_126.md) > TBParts - 143cc Big Bore Kit DRZ110 - KLX110 - Z125 - **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/tbparts-143cc-big-bore-kit-drz110-klx110-z125-p-1649.html) - **Markdown:** [this page as markdown](https://tboltusa.com/store/tbparts-143cc-big-bore-kit-drz110-klx110-z125-p-1649.md) - **Generated:** 2026-11-11 00:03 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=1649` All prices are in US dollars (USD). Shipping and any tax are worked out at checkout. ## Summary - **Part number:** TBW0986 - **Price:** $204.99 USD - **Stock:** In stock. This is a kit: the count is how many complete kits can be built from the parts on hand. - **Reviews:** [2 reviews, average 5 of 5](https://tboltusa.com/store/reviews/tbparts-143cc-big-bore-kit-drz110-klx110-z125-pr-1649.html) - **Product id:** 1649 - **Product last changed:** 2026-10-12 ## 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. - [Japanese Mini Bike Parts > KLX 110 & DRZ 110 > Big Bore & Engine Kits](https://tboltusa.com/store/klx-110-drz-110-big-bore-engine-kits-c-100_123_126.md) - [Japanese Mini Bike Parts > Z125 PRO](https://tboltusa.com/store/japanese-mini-bike-parts-z125-pro-c-100_1031.md) - [TB Parts > KLX110 DRZ110 > KLX110 DRZ110 Big bore and Stroker Kits](https://tboltusa.com/store/klx110-drz110-klx110-drz110-big-bore-and-stroker-kits-c-68_1048_1049.md) - [TB Parts > Z125 PRO](https://tboltusa.com/store/tb-parts-z125-pro-c-68_1091.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 143cc Big Bore Kit Fit all years 2002 to present 143cc Big Bore Performance Kit (60mm) **Key Features:** - NEW Ceramic coated all aluminum cylinder (no steel sleeve) - High compression domed 60mm piston with rings, pin, & clips - NEW Head gasket kit - Now includes the cylinder head o-ring set and an exhaust gasket. The all aluminum ceramic coated cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction, improves sealing, and runs cooler which results in longer engine life. This new cylinder along with a complete head gasket kit and domed piston set this kit apart from other similarly priced 143 kits on the market. Affordable and will make your KLX110 or DRZ110 a lot more fun to ride! High quality parts and requires no machining to the cases or other modifications - bolt on and go! There are no installation instructions, but if you can replace your piston, you can install this kit. If you don't have any experience working on your engine, we highly recommend purchasing the shop manual for your bike available in TECH DATA or from your local Kawasaki or Suzuki dealer. The parts are installed in the same manner as the OEM parts. Exceeds OEM Standard equipment specification. **Application:** - Kawasaki KLX110 and KLX110L 2002-Present - Suzuki DRZ110 2003-2006 - Kawasaki Z125 PRO **Note: Z125PRO application Must be used with an aftermarket fuel controller to prevent a lean condition and damage to your engine.** **Kit Includes:** - TBW0378 Cylinder - TBW0377 Piston Kit - TBW0306 Gasket - TBW0305 Gasket ## 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 - 143cc Big Bore Kit DRZ110 - KLX110 - Z125](https://tboltusa.com/store/tbparts-143cc-big-bore-kit-drz110-klx110-z125-p-1649.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/1649/qty/1` starts one with this product (the first value of every option, qty 1), `https://tboltusa.com/cart//add/item/1649/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 - 143cc Big Bore Kit DRZ110 - KLX110 - Z125 in my cart](https://tboltusa.com/cart/open/item/1649/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/1649/tbparts-143cc-big-bore-kit-drz110-klx110-z125-1.c1992625.jpg) - [Photo 2](https://tboltusa.com/store/img/p/1649/tbparts-143cc-big-bore-kit-drz110-klx110-z125-2.05aef899.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.