Re: Do slant heads really make a difference in power?
Well that is interesting.
I got 66/80cc Jet Silver Limited Edition Bicycle Engine.
From Pirate Cycles.
Maybe it's something to do with the limited Edition.
The piston has #5 and arrow on it.
I also notice the fins on the head are rounded more.
What is the Displacement listed on the Emmisions sticker ?
The PK80-J is 68.5cc.
If you have a flat top piston i would get rid of the head gaskets.
Use the thinnest aluminum you can find to make a new one.