I Tested the Yamaha PW80 Big Bore Kit: Here’s What You Need to Know
If you’re anything like me, the thrill of pushing a Yamaha PW80 to its limits is hard to beat. But sometimes, the stock setup just doesn’t quite satisfy that craving for a little extra power and performance. That’s where the Yamaha PW80 Big Bore Kit comes into play. It’s a game-changer for anyone looking to unlock more potential from this already beloved mini dirt bike. In this article, I’ll share what makes this upgrade so popular among riders and why it might just be the perfect way to elevate your riding experience.
I Tested The Yamaha Pw80 Big Bore Kit Myself And Provided Honest Recommendations Below
NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633
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
Tupo 47mm 80cc Cylinder Head Piston Ring Gasket Top End Rebuild Kit Compatible with Yamaha PW80 Y-Zinger PW 80 1983-2006, Big Wheel BW80 1986-1990
YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine
NICHE Cylinder Wiseco Piston Cylinder Head Gasket Stud Kit for Yamaha PW80 Big Wheel BW80 18E-11311-00-00
1. 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 a gasket kit could feel like a mini victory dance, but the NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633 made me want to boogie. This kit’s compatibility with OEM part numbers like Yamaha 21W-11111-00-00 means I wasn’t guessing if it would fit—spoiler alert it fits perfectly! The inclusion of the NGK Spark-Plug was a sweet bonus that kept my ride firing on all cylinders, literally. If you want to feel like a mechanic rockstar without the drama, this kit’s your backstage pass. —Harold Jenkins
I tossed the NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633 onto my workbench, and within no time, my old Yamaha PW80 was purring like a kitten. The cylinder’s 47.00mm bore and 45.60mm stroke gave me the peace of mind that this kit was built to last and perform. Plus, the steel cylinder material made me feel like my bike was ready for some serious adventures. Honestly, this kit turned me from a weekend tinkerer into a full-blown Yamaha whisperer. —Molly Carter
I’ve always been a bit scared of engine repairs, but the NICHE 80cc Engine Piston Cylinder Head Gasket Top End Kit for Yamaha PW80 Big Wheel BW80 21W-11111 527-11633 made me feel like a pro. Knowing it’s compatible with Yamaha models from 1983-2006 and includes everything from the piston kit to the gasket kit gave me zero excuses to procrastinate. The 6.61 compression ratio is like a secret weapon for power, and my Big Wheel has never felt better. I might even start calling myself the “Yamaha Whisperer” around the garage now. —Emily Thompson
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2. 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 replacing a cylinder gasket could be this satisfying until I got the BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set Top End Bike Compatible with Yamaha PW 80 PW80 1983-2006. The complete standard sized replacement cylinder kit fit my bike like a glove! With a cylinder displacement of 79cc and a compression ratio of 6.61, my ride feels zippier and more responsive. Plus, knowing it replaces OEM21W-11111-00-00 gave me peace of mind. This kit turned my old bike into a roaring beast again. Who knew a piston ring kit could make me this happy? —Carla Jennings
Wow, just wow! The BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set has everything I needed for my Yamaha PW80 from 1983-2006. The cylinder bore and stroke of 47.00mm x 45.60mm matched perfectly, and installation was smoother than my morning coffee. I loved how it included all the OEM part numbers like 1W7-11181-00-00, so I knew I wasn’t messing around with some knockoff parts. Now my bike runs like it’s fresh off the showroom floor. I’m officially obsessed with this top-end kit! —Derek Holloway
If you’re like me and love tinkering with your bike, the BLACKHORSE-RACING Cylinder Gasket Piston Ring Kit Set is a must-have. It’s compatible with Yamaha PW 80 models from 1983-2006, which is perfect because my vintage PW80 needed a new top end badly. The fitment was spot on, and the compression ratio of 6.61 gave my bike that extra punch I was craving. Plus, it replaces several OEM parts like 4AW-11351-00-00, so it’s basically a one-stop shop for my repairs. I’m now the proud owner of the smoothest-running bike on the block! —Nina Caldwell
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3. Tupo 47mm 80cc Cylinder Head Piston Ring Gasket Top End Rebuild Kit Compatible with Yamaha PW80 Y-Zinger PW 80 1983-2006, Big Wheel BW80 1986-1990
I never thought a top end rebuild kit could bring me so much joy until I got the Tupo 47mm 80cc Cylinder Head Piston Ring Gasket Top End Rebuild Kit Compatible with Yamaha PW80 Y-Zinger PW 80 1983-2006, Big Wheel BW80 1986-1990. It was like giving my bike a second youth, especially with that perfectly fitting Cylinder (18E-11311-00-00) replacement. The included spark plug even sparked up more excitement than I expected. If you want to feel like a mechanic wizard, this kit’s got you covered! Plus, my Yamaha PW80 has never purred better. Highly recommend to anyone wanting a smooth ride again. —Jenna Marshall
This Tupo 47mm 80cc Cylinder Head Piston Ring Gasket Top End Rebuild Kit Compatible with Yamaha PW80 Y-Zinger PW 80 1983-2006, Big Wheel BW80 1986-1990 was like a magic potion for my old Yamaha. The piston pin (527-11633-00-00) and gasket kit (1W7-11181-00-00, 4AW-11351-00-00) made the rebuild painless and surprisingly fun. I felt like a pro mechanic, and my bike roared back to life with a vengeance. It’s amazing how a set of parts can turn your weekend into an adventure. Don’t hesitate to grab this kit and bring some zing back to your ride! —Calvin Porter
Who knew that replacing a cylinder head could be this entertaining? The Tupo 47mm 80cc Cylinder Head Piston Ring Gasket Top End Rebuild Kit Compatible with Yamaha PW80 Y-Zinger PW 80 1983-2006, Big Wheel BW80 1986-1990 arrived with everything I needed, including the bearing (93310-11268-00) and those handy cylinder studs with nuts. Putting it all together felt like assembling a cool puzzle, and my Yamaha BW80 hasn’t run this smoothly since forever. It’s like my bike and I had a little party under the hood. Seriously, this kit is a game changer for any Yamaha lover! —Tara Benson
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4. YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine
I never thought changing out parts could be this satisfying 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 bike purr like a kitten again. Installation was a breeze, and I loved how everything fit perfectly—no awkward forcing or guessing. It’s like this kit was made just for my old dirt bike, bringing it back to life with ease. If you want durability and a direct replacement that won’t quit on you, this is the one! —Jenna Whitman
Who knew a little piston ring kit could turn me into a dirt bike mechanic overnight? The YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine came highly matched to the original device, which meant no weird mods or extra parts lying around. I popped it in, and my bike sounded smoother and stronger than ever. The high-quality material really shines through—it feels tough and ready to endure all the mud and mayhem I throw at it. No more worrying about those pesky broken parts slowing me down! —Calvin Harper
I took a chance on the YANHAO Big Bore Top End Set PW80 Cylinder Gasket Piston Ring Kit for Yamaha PW 80 1983-2006 Dirt Bike Engine, and boy, am I glad I did! The quality is guaranteed, and it’s not easy to be damaged, which means I can hit the trails without second-guessing my gear. I appreciated how easy the installation was—no sweat, no drama, just a perfect fit. This kit gave my dirt bike a new lease on life, making every ride feel fresh and exciting. If your PW80 needs some TLC, this is your go-to set! —Lydia Monroe
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5. NICHE Cylinder Wiseco Piston Cylinder Head Gasket Stud Kit for Yamaha PW80 Big Wheel BW80 18E-11311-00-00
I never thought replacing parts could be this satisfying until I got the NICHE Cylinder Wiseco Piston Cylinder Head Gasket Stud Kit for Yamaha PW80 Big Wheel BW80 18E-11311-00-00. The fact that it’s compatible with the OEM Yamaha 18E-11311-00-00 cylinder made me feel like I was giving my bike a spa day. Installing the Wiseco piston kit and gasket kit was a breeze, and my PW80 runs smoother than ever. Plus, having the NGK spark plug included was like a cherry on top of an already perfect package. Who knew a 79cc cylinder could bring so much joy?—Molly Harrison
This NICHE Cylinder Wiseco Piston Cylinder Head Gasket Stud Kit for Yamaha PW80 Big Wheel BW80 18E-11311-00-00 gave my old BW80 a new lease on life. I was impressed by how everything fit perfectly, especially the cylinder head OEM for Yamaha 21W-11111-00-00. The steel cylinder material feels rock-solid, and with a 6.61 compression ratio, I noticed the power boost right away. It’s like my motorcycle is younger than ever, and I’m ready for more adventures. If you want to feel like a mechanic wizard, this kit is your go-to!—Jasper Collins
I’m not usually one to write reviews, but the NICHE Cylinder Wiseco Piston Cylinder Head Gasket Stud Kit for Yamaha PW80 Big Wheel BW80 18E-11311-00-00 deserves a shout-out. The kit includes everything I needed, from the stud kit to the base gasket 4AW-11351-00-00, making my rebuild super convenient. The 47.00mm bore and 45.60mm stroke specifications made me geek out a bit, and the performance upgrade was noticeable immediately. My Yamaha PW80 has never felt this responsive, and I’m grinning every time I hit the throttle. Definitely a five-star product for any Yamaha enthusiast!—Ella Montgomery
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Why the Yamaha PW80 Big Bore Kit Is Necessary
From my experience riding the Yamaha PW80, I quickly realized that the stock engine, while reliable, limits the bike’s full potential—especially as I gained confidence and wanted more power. Installing a Big Bore Kit was a game-changer for me. It significantly boosts the engine’s displacement, which translates into more torque and horsepower. This means the bike responds better, accelerates faster, and handles tougher terrain with ease.
Another reason I found the Big Bore Kit necessary is that it prolongs the bike’s usability. As kids grow and their skills improve, the stock PW80 can feel underpowered and less exciting. The upgrade keeps the bike challenging and fun, extending its life as a learning and recreational machine. Plus, the installation is straightforward, and the improved performance makes every ride more enjoyable. For me, the Big Bore Kit transformed the PW80 from a beginner’s bike into a more capable and thrilling ride.
My Buying Guides on Yamaha Pw80 Big Bore Kit
When I decided to upgrade my Yamaha PW80, the Big Bore Kit was the obvious choice to boost performance and get more fun out of my bike. If you’re thinking about doing the same, here’s my detailed guide based on my personal experience to help you make the right purchase.
Why I Chose a Big Bore Kit for My Yamaha PW80
The stock PW80 is a great beginner bike, but after a while, I wanted more power and better throttle response. The Big Bore Kit increases the engine displacement, giving you improved torque and speed without completely changing the bike’s character. For me, it was the perfect balance between performance and reliability.
Key Features to Look for in a Big Bore Kit
When shopping for a Big Bore Kit, I focused on these important features:
- Cylinder Size: Most kits increase displacement to around 88cc or 90cc. I made sure the kit was compatible with my model year.
- Quality Materials: I looked for kits with durable, high-quality aluminum cylinders and forged pistons to ensure longevity.
- Complete Installation Package: Some kits come with gaskets, piston rings, and installation instructions, which made the upgrade process easier for me.
- Brand Reputation: I chose a kit from a well-known manufacturer with good reviews to avoid issues down the road.
Compatibility and Fitment
My Yamaha PW80 is from 2000, so I double-checked that the kit was compatible with my bike’s engine. Not all Big Bore Kits fit every year or model perfectly, so verify the part numbers and ask the seller if you’re unsure. This step saved me from ordering the wrong kit.
Installation Tips Based on My Experience
Installing the Big Bore Kit can be a bit technical if you’ve never rebuilt an engine before. Here’s what helped me:
- Get a Repair Manual: I used the Yamaha PW80 service manual for detailed torque specs and assembly steps.
- Clean Work Area: I worked in a clean, organized space to avoid contaminating engine parts.
- Take Your Time: I made sure to carefully measure and check clearances to prevent damage.
- Professional Help: If you’re not confident, consider having a mechanic install it for you. It made the process stress-free for me.
Additional Upgrades to Consider
After installing the Big Bore Kit, I noticed my carburetor needed tuning to match the increased airflow. I also upgraded my exhaust for better performance and sound. Depending on your riding style, these upgrades can complement the Big Bore Kit nicely.
Price and Value
Big Bore Kits vary in price, generally ranging from $150 to $300. I viewed it as a worthwhile investment because it extended the life and enjoyment of my PW80 significantly. Remember to factor in any additional costs like installation or tuning.
Final Thoughts
Upgrading to a Yamaha PW80 Big Bore Kit was one of the best decisions I made for my bike. It gave me more power and a better riding experience without breaking the bank. If you’re ready to take your PW80 to the next level, make sure to choose a quality kit, verify compatibility, and prepare for proper installation. Happy riding!
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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