Do not hone the cylinder, it could ruin it. Take the cylinder off and inspect it, the piston and ring. You should be able to see the problem easily, if you need help interpreting the condition of your parts you might take some pictures and post them. You could just throw a new top end on and be done for just under $100, parts are in stock. But with only 3-1/2 gallons through it I would assume it should still beunder the warranty offered by all authorized DLdealers.</p>