⚡ Power Up Your Classic Yamaha Ride with JDMSPEED Precision!
The JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit is a comprehensive upgrade package designed to boost the performance of Yamaha QT50 (1979-1987) and PW50 (1981-2009) motorcycles. Weighing just over 5 pounds and featuring a painted exterior, this kit includes all essential components—cylinder, piston, gaskets, rings, spark plug, and hardware—ensuring a perfect fit and durable, high-performance enhancement for your bike’s engine.
| Manufacturer | JDMSPEED |
| Brand | JDMSPEED |
| Item Weight | 5.15 pounds |
| Product Dimensions | 8.27 x 5.91 x 5.91 inches |
| Country of Origin | China |
| Item model number | CPGPW50 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | CPGPW50 |
K**R
Was sceptical but worked out great!
No damage! Everything fit well. Went together smooth. Bike fired up on second kick! Gotta love it when it all works out. Give it a try you might get lucky like me!
B**.
Poor quality control
No thought or care when packaging. Head gasket was bent and dented due to way was packaged as well as the piston rings. Sent back and exchanged and next set was the same if not worse. Once installed with set that didn’t look wrecked once all back together bike only has 50psi of compression and won’t even start. This kit is complete trash
M**K
Poor packaging
The cylinder and piston quality seems fine for this little 50. However, the head and gaskets were damaged due to poor packaging. I expect almost all available replacement parts I’ll have this same issue. Looks to be from original manufacturer.
D**L
Great economical tope end replacement
My 1981 PW50 had low compression. This nice economical top end replacement had it running in an hour!
J**Z
Exelente inversión
The media could not be loaded. Le quedo bien 👍 más fuerza 💪🏻
G**M
Worked great.
Easy to install if you worked on a two stroke. Works great. No jetting changes, and the plug looks good. Now makes the PW50 able to pull up hills.
M**R
Terrible
This product is not a big bore. It’s stock bore. The head in my kit came with damage to the cooling fins. The head gasket was also bent too badly to even use. The kit includes zero instruction so you basically have to guess which ring is the top one and which is the bottom. Would not purchase again. Trash...
K**R
You get what you pay for.
Well the first cylinder kit I got from them a year ago was great. So when I needed another set, I just reordered. This time, the gasket and rings were bent. Poor packaging. I had to order another set of gaskets from another seller that would arrive in time and reused my old rings so my kid could use his bike. (I am teaching him how to fix\rebuild.) Ya, I could have sent back and maybe they would have been better, but the weekend is fast approaching and it could not wait. To the seller: watch your packaging. We will more than likely try again with them because the first set was good and lasted a year.
Trustpilot
5 days ago
1 week ago
