DD - done what I should have in the first place - just spent this AM going through your whole build thread ................. amazing work - hat's off.
Actually the thread title originally stalled me from checking it out from the beginning, as I thought you WERE building an Excelsior !
Now then, my comments about the suitability [ just ] of the 250 Yam hauling my bulk around make sense as I can see the potential lightweight aspect of the finished bike. I have to say that the Golden Brown bike took my fancy as soon as I picked the mag up. That was on our Summer break at our place in Saxony and Mrs. B was not best pleased that I had my head stuck in a bike mag for 2 hours when there was an acre of garden that needed mowing !
Unfortunately I have neither the skills or facilities to undertake what you have built - imagination / design skills - yes.
So, a variation on the Golden Brown would be more down my street.
Would be good to have a "Baby Brother" to keep the 1000cc Cafe Creme company !! I also have another colourway that just lost out to Cafe Creme that would be good to use.
BTW - here in the UK there is currently a large grey area in the regs. My plan is to get an early Yam - say 125 / 250 single - pre- 1972 and use the headstock with the chassis / vin # to construct the frame from. That gives me registration with a Tax Free Historic title that means I have no annual road tax to pay Not that it's a fortune for a 250cc bike, but there is another reg change in the offing that means an annual MOT [Safety Check ] is not required. Insurance would be also be cheaper.
Anyway - your build is a true inspiration and with all the details and pix as a pointer for those of us thinking along similar lines. Respect.