Sounds like the rings are bad possibly from sitting for 2 years. No big deal though. The job will take you if first time about 1 1/2 hours. You can call me and I can instruct you on how to do then if needed. Depending on the age of the engine Sunl used to have 57mm rings than switched to the more common 57.4mm rings. This you won't know until you pull the cylinder off and measure the cylinder. TOM
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