take it apart and see if the cylinder is damaged so you can assess what you actually need. It has the molded crank seals on the bearings that rarely fail unless the bearing takes a dump, the piston kit is dirt cheap at 12 bucks+ 7 dollar tube of permatex black, 3 dollars worth of fuel hose and your in business... . Being super critical rebuilding a 100 dollar black friday chainsaw is quite humorous 
