I like Stihl's. That 026 is worth fixing for sure. But don't just slap a piston and rings at it, it failed for a reason, I'm betting air leak, either on the impluse line, carb boot or crank seals. Replace rubber stuff with OEM only. Caber has good rings and Meteor makes a nice piston.
Here are what I use, 044, ported 026, 192T and HT101.
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