"<br>I have this 1978 Cailiffo moped (???)<br>and I have never seen anything like it.<br>It has a cap on the top of the engine that asks for 20w30 motor oil. does that make it a 4 stroke???<p>anyway that isn't the problem. I sort of ""found"" this thing is a field and the last time it was registered was 83, and now I know why, the piston is stuck in the cylinder (seized). <br>I'm sure this has happened to someone else and I want to know if there is a way to undo the problem. Soak it in oil?<br>Some tool? hit it with a hammer? Anything!!!<p>leave a message here or email me <br>firstname.lastname@example.org"