Got a great deal on an 036 Quick Stop, and was given a busted 026 from a neighbor. New lines, filter, seals, Chinese clutch cover and handlebar, hours of cleaning crud off, sanded and Scotch Brited the cylinder, MMed, replaced the scored piston with a Meteor and reused the clips.
That last part was a mistake.... Ran 2 minutes before it popped out and the wrist pin took out the transfer bridge on one side. Oh well, I guess this is open port now. Smoothed it out (meant to leave a bit of a tab but my M18 grinder isn't exactly light or precise, slipped a bit and had to go further to knock out scratched plating) and took out the bridge on the other side to match.
The new piston was chewed up a bit, bottom ring was cracked and pinched. Pulled the fragments out, shaved off the lumps and ran some sandpaper in the groove. Was thinking of just running it with 1 ring, but took an old worn one from the old piston.
175ish PSI. Ran like **** at first because I abused the throttle linkage a dozen times and bent it out of shape. This is the most frustrating linkage to hook into the carb that I've ever dealt with. At least until I reviewed the shop manual and realized it's only a single screw to take the top of the handle off and access the trigger linkages. Runs half decent now, better than when I got it, but haven't chewed much wood since the rebuild.
The (fresh) new piston was the only real "improvement" I was trying to do, the cylinder work and piston repair was just to avoid spending money to replace. Ugly, improper tools for the job, but hey it works (for now) and I've gained a rich more experience. (Last pic should have been first)