Cylinder Head Question
 

I am parting out my bike and was able to remove the cylinder head without a problem. But what about the actual piston? What is the trick to getting the piston off? Thanks Both happen to be in great shape.

Re: Cylinder Head Question
 

I don't know how it's made in GZ, but usually there is a pivot inside to make connection to the shaft. The pivot is set and protected from fall off by some kind of rings.

Re: Cylinder Head Question
 

It pivots on a vertical shaft. I cannot find any type of release though.

Re: Cylinder Head Question
 

I would try to beat it out (but that's risky) or create a simple machine from bolts and flat metal pieces to wrap piston and then use screw turn to move it out of the piston.

Re: Cylinder Head Question
 

I am at a bit of a loss here. Probably the wrong understanding of the terminology. I have doubts about removing the piston until you remove the cylinder barrel first. That will likely lead to engine removal. Even after removing the piston you will have the connecting rod leading down into the engine case. What is the final goal of the tear down?

Re: Cylinder Head Question
 

The cylinder wall came off easy enough. The rod is what I am having trouble dealing with. The actual pistion on the rod. I'm not sure how to release it.

Re: Cylinder Head Question
 

http://www.motorera.com/dictionary/pics/p/piston1.jpg


http://raanz.org.nz/wiki/uploads/TM/tmfig057.png

Re: Cylinder Head Question
 

There is a circlip at each end of the wrist pin(gudgeon pin) in the piston. You will be best off with circlip pliers to remove them. Then the wrist pin can slide out and release the connecting rod from the piston.

Re: Cylinder Head Question
 

I will have to take a closer look. I figured I would have to use a wooden dowel rod and knock out the pin. But I will take a closer look for the circlip. Thanks

Re: Cylinder Head Question
 

You need to remove one of the circlips, then tap the piston pin out with a wooden dowel pin. Make sure you put a towel over the crankcase to prevent the circlip from falling into the crankcase.