I picked up a decent HSSK-50 yesterday on trade. I have it all apart already. The bore and the piston look very good. Are Tecs like Briggs engines where you can order a new set of rings and install or do they need to be honed? Also, this engine has a microscopic exhaust valve. I'm not sure if it's normal, but the stem seems slightly loose in the guide. Intake feels good. Anything else I should look at on this little thing? This is my first venture into Tecumseh. I heard these little buggars will rip pretty good though so I'm excited.