I found a 1977 KE250 street legal 2T for $100 (asking) with a TITLE.
This bad boy needed a discontinued Piston, Rings, Pin, Bearing, Clips, Gaskets. Fork seals are also blown. The kid had given up trying to find parts for it. Told me he would even take less than $100. I laughed and gave him the $100 bill and loaded her up.
After 2 weeks of careful eBaying, I found ALL the parts I needed NOS for $145 shipped.

I paid $150 for my WR500 top end kit this year!
EBAY IS KING AGAINReassembled and ignition timing verified, it started 1st kick.

With 2 heat cycles under it's belt, I straddled my new stead and clicked through all 6 gears down my street. I imagine it will easily merge onto the freeway and go a short distance at 70-75mph with NO problems. (I'd feel weird about constant throttle with a 2T for miles and miles.)
This thing has some great torque and came with the original service manual!
I am excited for my vintage ride and plan on doing some cool RR's before I sell it.
http://www.youtube.com/watch?v=0cYoSjYgiKE
-BIG DAN

That front tire is pretty slick so i'm guessing it was rode on the street or pavement alot... 
) and he just premixes the gas. After we tipped the bike to check for oil(a 1981 KE 100, could be a classic, and instead it is abused) and found some he changed his story to THE PO MUST HAVE MODDED IT TO ONLY RUN ON PREMIX