I agree with the old bloke :)
If you ever want to learn how to rebuild a motor this is the perfect start. Just send the head of to get reconditioned, everything else is reasonably simple with a little know how or research. Get a manual of ebay.
I assisted with the rebuild on mine, the hardest bit was re-kitting the carbies. The trick to them was getting the correct rebuild kit (fluked that one :) ) then taking one piece out and putting the new bit in, one bit at a time.
Getting the timing and final tune all done will probably take some help but shouldn't cost too much if you do everything else yourself.