@Mike: Calm down, we're not trying to make rules for anyone.
Everyone should do what they want to do. What I was just trying to say, that most people who get into mopeds and are not very technically inclined should not kit their engines. Because most of em will fail and start complaining to us. They should learn before attempting the advanced stuff.
Now your case is a bit different. You are technically inclined and when you broke your stuff, you didn't come whine to us but you just thought: Crap, it's broken. Let's fix it. I have no problem with that. I respect that.
I've never seized a kit in my life (Well once, but that was because I wasn't particulary sober when assembling that engine and I forgot the piston-clips), because I took the long way. I started with 50cc stock bikes, adding an exhaust, fiddling with jets etc.
If I had started out with an 80cc kit, I would have failed miserably.
I think the problem lies with the people who think that it's all just bolt-on fun. They don't understand or appreciate the complexity of an engine.