8R9 YAMAHA

Has anyone ever seen a mono-block 440 cc yamaha from the mid 1970's I am looking for one.

YAMAHA TOP DOG is what they call themselves. website is www.speedandsportinc.com. I have bought many ,many parts from them, parts are at full retail price, but if you need them they got it.

I am looking for parts I need TZ 500 crank,cases jugs and heads thanks any idea where to look? Please keep wanted ads to the relevant forum...Thanks

Look at speedandsportinc.com they have everything nos yamaha only huge place.