Since you asked. I made this. It is the exact width and the exact diameter of the crankcase for where the bearing seats on a Poulan 295. I clamped the cylinder upside down and took measurements with it stock. I made it from a piece of round stock aluminium and then set it into where the bearings go and then started grinding very slow with equal pressure on both sides. I switched the cylinder from side to side to try and keep everything even taking lots of measurements as I went. When I got .020" out of it and then sanded down the base of the cylinder .020. I put it all together and checked the squish making sure it was now at .020". Now I probably did this measurement as I went along 5 or 6 times making sure I did not over shoot anything. Put new bearings in seals in double checked the squish and did a leak test and all was tight and good.
The compression would have been higher but I raised the exhaust port also so that is why 160 psi. Other wise I think it would have be up around 170 or better.
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