Very good point slabghost. I see that as I am looking online...that and they seem to like them for bobbers, custom choppers, etc. They lady at the Albuquerque cycle salvage said someone came in 2 years ago and bought every 650 Yammie engine she had...I may well be barking up the wrong tree. Crap I sold mine for $600 about 8 years ago...
I have been interested in the past in the KZ750 but didn't they have a problem with their exceedingly long cam chain and keeping it tight enough? Seems I read about that once. I remember, in fact I think I still have the article about a sidecar rig the Doug Bingham built using one for a couple who were taking it to Africa back in the 80's.
The thing that keeps my interest with the XS is the fairly large aftermarket for them...I guess that goes along with their popularity and would help drive the price up.
I see you have a KZ750...is yours a twin or four cyl?
Brian