siezed motor, repair help needed

get a factory service manual, I'd pull the jug off and take a look. A lot of guys warn that the stock 220 piston breaks and suggest it be replaced asap. It sounds like it may be to late for you.If it was a piston break for you ,you may be able to get away with just having the ciylander replated / with new piston, Wish you luck.

I have heard several stories about the stock 220 piston grenading, especially if there are any mods done. That (along with some fork springs) is next on the agenda.

norcalsean check out he JustKDX web site there its lots of info there that will help you out. Be sure to pay special attention to the kips shaft article to ensure you don't damage the shaft when removing the actuator bolt.

When I hear overheated the first thing that jumps to mind is that the engine was running lean. Be sure you just don't replace the top end without inspecting the condition of the crank, crank seals etc to see if you can determine the cause of the problem. Of course if you pull the top end you will want to replace the piston with a Wiseco piston rather than a stock unit as they are prone to cracking over time.

If you find that the cylinder has been damaged Eric Gorr offers a 225cc over bore, porting and head mods that works very well and is cheaper than going with factory replacement parts.

Hope that helps. If you need more help once you get the top end apart get back to us and I'm sure you'll get the guidance you need.

David

what was broken ???