Along the same line of thought...
I once had someone looking at my 1972 S2 Kawasaki handlebars
and he actually asked "where is the starter button?" 
michel
Up my cyclinder count, just got another bike cb650sc
You got a 1972 Kawasaki S2? You lucky dog! That's one of the bikes that I always wanted to get. I test-rode one at the Kawasaki dealer near I-15 in Las Vegas when they were new and they cost only $879 back then but I just had a new girlfriend so I bought a used 1971 Honda SL350K1 for $400 instead and spent the rest on dates.
I have a 1976 Kawasaki KH500 and that bike handles more like the current 250 street bike, feels even lighter once you get off the CB750, the engines feels more smoother too.
The original S2 had a reputation of being a wheeler king and many says that it feels like a 125 with super light handling. Of course the fuel consumption rate was even worse than their 500cc or even 750cc cousins, especially since nearly 30% of the fuel is being used for cooling!
Still, getting the S2 in good condition is on the top of my list. I thought the original red 1972 model was one of the best looking bikes, especially since they changed to less appealing tail section design (but more practical for leg mounting)for the 1973 model.
1972 Kawasaki S2 must be one of the most fun "kick-starter" only bike in its day, along with Yamaha 350 R5.
