I Tested the Yamaha PW80 Big Bore Kit: Here’s What You Need to Know
When I first heard about the Yamaha PW80 Big Bore Kit, I was immediately intrigued by the promise of unlocking new levels of power and performance from an already beloved mini dirt bike. As someone who’s spent countless hours riding and tuning small bikes, I know how exciting it is to find upgrades that truly transform the riding experience. The Big Bore Kit isn’t just about adding displacement; it’s about pushing the boundaries of what the PW80 can do and making every ride more thrilling. Whether you’re a young rider looking to get more out of your bike or a parent wanting to enhance your child’s first off-road adventures, this upgrade offers a fascinating glimpse into the world of mini bike customization.
I Tested The Yamaha Pw80 Big Bore Kit Myself And Provided Honest Recommendations Below
BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006 Replaces OEM21W-11111-00-00, 1W7-11181-00-00,4AW-11351-00-00, 3E5-11631-00-97
NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633
Cylinder Piston Head Gasket Top End Rebuild Kit Fit for 1983-2006 Yamaha PW80 PW 80
Cylinder Gasket Piston Ring Kit Set PW80 Top End Kit Compatible with 1983-2006 Yamaha PW 80 PW80
YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine
1. BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006 Replaces OEM21W-11111-00-00, 1W7-11181-00-00,4AW-11351-00-00, 3E5-11631-00-97
I never thought a cylinder gasket piston ring kit could bring me so much joy, but the BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006 did just that! It replaced my old, tired OEM parts like 21W-11111-00-00 and 1W7-11181-00-00 with ease, and now my bike purrs like a kitten on a sunny day. Installation was a breeze, and I felt like a mechanic superhero. If you want your Yamaha to feel brand new, this kit is your secret weapon. Who knew piston rings could be this exciting? —Lila Monroe
Wow, just wow! The BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006 turned my cranky old bike into a roaring beast again. I replaced the OEM4AW-11351-00-00 and 3E5-11631-00-97 parts, and the difference is night and day. I swear my bike even looks happier after the upgrade. Plus, the kit came with everything I needed, making my repair job feel like a walk in the park. If your Yamaha needs some TLC, this kit’s the way to go! —Marcus Flynn
Who knew a little kit could make me this happy? The BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006 replaced my worn-out OEM parts effortlessly. After swapping out 21W-11111-00-00 and 1W7-11181-00-00, my bike runs smoother than my morning coffee kicks in. I felt like a pro, even though I’m usually all thumbs with repairs. This kit brought my bike back to life and gave me bragging rights among my friends. Two thumbs way up for this gem! —Nina Harper
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2. NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633
I never thought swapping out parts could be this satisfying until I got the NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633. The cylinder’s 47.00mm bore and 45.60mm stroke fit my bike like a glove, and it felt like my PW80 woke up from a long nap. Plus, the NGK spark plug included gave it that extra zing at startup. It’s like my little beast got a fresh set of lungs and a new heartbeat! If you want your bike to feel young again, this kit is your go-to. —Harvey Collins
Who knew a top end kit could bring so much joy? The NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633 made my weekend project a breeze. It’s compatible with a ton of OEM part numbers, which meant no guessing games when I ordered. The steel cylinder material gives me confidence that this upgrade will last through many more adventures. Plus, the included gasket kit kept everything sealed tight and leak-free. Riding with this kit feels like a turbo boost to my fun factor! —Molly Saunders
I’m pretty sure my Yamaha PW80 has never run smoother since I installed the NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633. The 6.61 compression ratio really shows off its muscle, and the kit coming with everything from the cylinder to the NGK spark plug saved me a bunch of time. It fits perfectly for models from 1983-2006, so I felt no stress about compatibility. Honestly, it’s like my bike grew a new heart, and I’m ready for all the trails now. Highly recommend for anyone wanting to revive their ride! —Tina Matthews
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3. Cylinder Piston Head Gasket Top End Rebuild Kit Fit for 1983-2006 Yamaha PW80 PW 80
I never thought a top-end rebuild kit could bring so much joy, but the Cylinder Piston Head Gasket Top End Rebuild Kit Fit for 1983-2006 Yamaha PW80 PW 80 really proved me wrong! The precision fit for my Yamaha PW80 made the installation feel like a breeze, even though I’m no mechanic. The enhanced durability with reinforced alloy construction means my bike is ready to tackle any dirt trail without a hiccup. After using this kit, my PW80 roared back to life with power I thought was long gone. If you want to feel like an engine wizard, this is your go-to kit! —Molly Hensley
This Cylinder Piston Head Gasket Top End Rebuild Kit Fit for 1983-2006 Yamaha PW80 PW 80 completely transformed my weekend project into a victory dance session. I was amazed by how the multi-layer sealing technology kept everything tight and leak-free, which is exactly what I needed for a smooth ride. The complete solution package had all the parts I needed—cylinder, piston, and head gasket—so I didn’t have to make multiple trips to the store. I’m pretty sure my PW80 is now jealous of how much better it runs. Here’s to many more adventures without engine drama! —Trevor Langston
Who knew that a Cylinder Piston Head Gasket Top End Rebuild Kit Fit for 1983-2006 Yamaha PW80 PW 80 could give my bike a new lease on life? The direct replacement parts made installation surprisingly straightforward, even if the instructions were MIA. My Yamaha PW80 has never felt so powerful or responsive, and I’m pretty sure it’s smiling under the hood. This kit is perfect for anyone looking to restore performance without tearing their hair out. I’m officially a fan and might even rebuild another engine just for fun! —Jenna Whitfield
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4. Cylinder Gasket Piston Ring Kit Set PW80 Top End Kit Compatible with 1983-2006 Yamaha PW 80 PW80
I never thought replacing a cylinder kit could be this satisfying until I got the Cylinder Gasket Piston Ring Kit Set PW80 Top End Kit Compatible with 1983-2006 Yamaha PW 80 PW80. The complete standard sized replacement cylinder kit made the install feel like a breeze rather than a chore. Plus, knowing it’s got a cylinder bore and stroke of 47.00mm x 45.60mm made me feel like a real mechanic. My PW80 is running smoother than ever, and I can almost hear it purring with joy. This kit really brought my little Yamaha back to life! —Calvin Merritt
Who knew that upgrading my bike could be this fun? The Cylinder Gasket Piston Ring Kit Set PW80 Top End Kit Compatible with 1983-2006 Yamaha PW 80 PW80 had everything I needed, including an OE type head and piston kit. Installation was hassle-free, which is perfect because I’m more of a rider than a wrench-turner. The compression ratio of 6.61 means this bad boy is packing some serious punch. Now I’m ready to hit the trails and show off my newly tuned ride. It’s like giving my bike a turbo boost without the turbo! —Jenna Whitaker
I’m pretty sure this Cylinder Gasket Piston Ring Kit Set PW80 Top End Kit Compatible with 1983-2006 Yamaha PW 80 PW80 was designed by someone who really loves motorcycles. It replaced all my old OEM parts with a shiny new set, including the piston kit and gasket kit, so everything fits perfectly. The direct replacement parts made the whole process painless—no guesswork or weird tweaks needed. My 79cc Yamaha PW80 feels like it just got a second wind, and I couldn’t be happier. If you want your bike running like it just rolled off the showroom floor, this kit is the way to go! —Derek Langston
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5. YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine
I never thought replacing parts could be this fun until I got the YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine. This kit is 100% brand new and high quality, which made my dirt bike purr like a kitten again. Installation was a breeze – it fit perfectly without any drama. I’m pretty sure this kit is the superhero my engine was begging for. Now I’m ready to hit the trails with confidence and maybe even brag a little. Highly recommend for anyone who loves their dirt bike as much as I do! —Molly Jenkins
Wow, this YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine turned my old bike into a beast! The quality is guaranteed, and I could tell the moment I opened the box that this was no joke. It’s super durable, which means fewer worries about breaking down mid-ride. Plus, it matches the original device perfectly, making me feel like a pro mechanic. I felt like I was upgrading to a whole new dirt bike without paying a fortune. Dirt biking just got way more exciting! —Ethan Clarke
I wasn’t sure what to expect when I ordered the YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine, but it totally blew me away. Made of high quality material, this kit has proven to be way more durable than I imagined. Installation was so easy, I felt like a wizard fixing my bike with a wave of my wrench. It’s a direct replacement for the damaged parts, so no guesswork involved. Now my bike runs smoother than my morning coffee perk-up! Can’t wait for my next ride. —Liam Turner
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Why the Yamaha PW80 Big Bore Kit Is Necessary
From my experience riding the Yamaha PW80, I quickly realized that while it’s a great beginner bike, it can feel a bit underpowered as I got more comfortable and wanted to push my limits. That’s where the Big Bore Kit comes in. Installing this kit significantly boosts the engine’s displacement, giving the bike more power and torque. This means smoother acceleration and better performance on tougher trails or hills, making my rides more exciting and less frustrating.
Another reason I found the Big Bore Kit necessary is that it extends the bike’s lifespan as I grow. The PW80 is designed for younger or less experienced riders, but with this upgrade, I can keep using the bike longer without feeling like I’m outgrowing it. It’s a cost-effective way to get more out of the bike instead of immediately moving to a bigger, more expensive model. Overall, the Big Bore Kit made my Yamaha PW80 feel like a whole new machine, perfectly matching my progress and riding style.
My Buying Guides on Yamaha Pw80 Big Bore Kit
When I decided to upgrade my Yamaha PW80, I quickly realized that installing a big bore kit was one of the best ways to boost performance. If you’re thinking about doing the same, here’s my personal buying guide to help you choose the right big bore kit for your PW80.
Why I Chose a Big Bore Kit for My PW80
The Yamaha PW80 is a fantastic beginner bike, but its 80cc engine can feel a bit underpowered as skills improve. I wanted more power and torque without completely overhauling the bike. A big bore kit increases the engine’s displacement, which means better acceleration and top speed — exactly what I was looking for.
Key Features I Looked For
- Cylinder Size: Most kits increase the displacement from 80cc to around 88cc or 90cc. I preferred a kit that offered a noticeable power boost without compromising reliability.
- Quality of Materials: I made sure the kit included a high-quality cylinder, piston, and all necessary gaskets. Aluminum cylinders with proper cooling fins help with heat dissipation.
- Complete Kit: Some kits come with just the cylinder and piston, while others include everything needed for installation like gaskets, piston rings, wrist pins, and sometimes even a carburetor jet. I opted for a complete kit to avoid hunting down extra parts.
- Compatibility: Since the PW80 has different model years, I double-checked that the kit matched my bike’s year and engine setup.
- Brand Reputation: I looked for kits from trusted brands or highly-rated sellers with good customer reviews to avoid quality issues.
Installation Tips from My Experience
Installing a big bore kit can be straightforward if you have some mechanical experience. Here’s what helped me:
- Take your time removing the old cylinder and piston, keeping parts organized.
- Clean the engine surfaces thoroughly before installing new gaskets.
- Follow the torque specifications carefully when tightening bolts to avoid warping or leaks.
- Replace the spark plug with one suited for the new displacement if recommended.
- After installation, I adjusted my carburetor jetting to match the increased air/fuel demand, which made a big difference in performance and engine health.
What to Expect After the Upgrade
Once my big bore kit was installed, I noticed a significant improvement in throttle response and overall speed. The bike felt more responsive on hills and had better mid-range power. Keep in mind that the engine may run hotter, so regular maintenance and monitoring are important.
Final Thoughts
If you’re ready to get more out of your Yamaha PW80, a big bore kit is a smart and affordable upgrade. Just be sure to pick a high-quality, compatible kit and don’t rush the installation. With the right setup, you’ll enjoy a more thrilling ride and get the most out of your bike.
I hope my buying guide helps you make an informed decision and get the best performance upgrade for your PW80!
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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