O.K. I found this article while surfing the internet on the jfnorris.com site . It works and I recreated it here so some of you guys could check it out. I must warn you that I will not be held responsible for any damage to your engine, home, or your person while trying this (in short I will not be held liable for any damage)!


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OK this is a project I decided to try out after seeing an auction on ebay for a sleeve resize. The auction said that the sleeve was the one that wore out instead of the piston, and the only thing that the engine needed to work again was a sleeve resize.
I kept thinking about this a decided to resize my worn out sleeve, it worked excellent for me so I decided to sell the idea. I suggest you try it with one that you are not using just in case it doesn't come out right for you the first time. ((This will only work with normal wear out piston and sleeve, not scratched)))
Here is what you'll need:

*Hose clamp -- from your local auto parts dealer about. 50¢

*The corresponding tool to tight the clamp.

*The sleeve to be resized (DUH!!)

Put the clamp around the sleeve (The sleeve I'm using is from my Pro.15 engine) and tighten it up. Do not tighten it too much. Tighten it until its hard to move the piston inside the sleeve.



***In this step use caution***

Put the sleeve on the stove so it gets really hot. The stove I used was a glass top stove so I just put the sleeve on top of the naked glass. If you have a glass top or a normal ELECTRIC stove just put the sleeve right on top, but if you use a GAS stove I would suggest putting the sleeve inside a pan or some kind of recipient so the sleeve is not exposed directly to the fire. I left it there for about 2 minutes.



********CAUTION***********
Grab the sleeve with a pair of pliers (be gentle with it when using pliers, since its really hot, you could easily bend the sleeve out of shape) or some oven gloves, and QUICKLY drop it inside a container with water. This will cause the sleeve to stay the way you tighten it up when you take away the clamp.

Now, if you can't get the piston to go inside the sleeve after the process, then take the sleeve, this time without the clamp, put it upside down on top of the stove and heat it again. After a moment take the pliers and grab the piston by the connecting rod and force it into the sleeve. This will open up the sleeve and allow the piton to enter tightly. DO NOT leave the piston inside the sleeve when you drop it inside the water again. Take the piston out by just grabbing the sleeve with the pliers and pulling the piston by the connecting rod. The rod will get really hot too so use another pair of pliers or just a rolled up piece of paper towel. Dry everything well and rinse it with denatured alcohol.
After this just put some after run oil on the piston and sleeve. Put the engine back together putting after run oil on everything. You will have to break-it-in again. I hope this saves you some money on a new engine or piston and sleeve replacement.

I did this and it worked for me, I'm sure it will work for you too, but I'm not responsible for any damage you cause to your self, to others, or to your property while doing this.
Not there is no easy way to get the sleeve enlarged. DO NOT leave the piston in the sleeve when you put it in the water. IT WILL CRACK THE SLEEVE!