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Cylinder Piston Gasket 40cc Big Bore Top End Kit
Fitment
- Replacement For Yamaha QT50 1979-1987
- Replacement For Yamaha PW50 1981-2009
Package Include
- 1x Cylinder
- 2x Gaskets
- 1x Piston
- 1x Piston Pin
- 2x Piston Rings
- 1x Sleeve Bearing
- 2x Cir-Clips
- 4x Head Cylinder Studs
- 4x Stud Nuts
- 1x Spark Plug
Mickala Sottek
Reviewed in the United States on March 8, 2024
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.
Brett P.
Reviewed in the United States on January 7, 2024
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
Kindle Customer
Reviewed in the United States on April 24, 2024
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 fixrebuild.) 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.
Daniel
Reviewed in the United States on January 26, 2023
My 1981 PW50 had low compression. This nice economical top end replacement had it running in an hour!
Jorge Rodriguez
Reviewed in the United States on March 28, 2022
The media could not be loaded.
Mark A. Joyner
Reviewed in the United States on May 25, 2019
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...
Kindle Customer
Reviewed in the United States on October 25, 2019
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!
Greg W Fedelem
Reviewed in the United States on April 2, 2019
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.
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