cyclehoarder
Well-Known Member
Obviously, that seat is a combo Corbin/Stock bolster/Corbin pillon arrangement. An interesting idea. Why don't you show us the undersides of those 3 pieces when you have some time? I'm not the only one who would be interested to see the hardware, shapes, and points of attachment.
FYI, if you look at my upper-right-hand info, you will fine the factory name for your 'maroon' color. If it was a pair of Bostonian shoes, they would probably call it 'Oxblood.'
I think it's pretty-easy to turn that 250 cc DS 7 into a rip-snorting 350 twin. A bit of porting, some expansion chambers and I bet you could get 40 RWHP which is probably double what the DS 7 makes. As I recall, the 350 has the same stroke but is 10 mm larger bore. Easy to do, easy to restore back to stock. Get a pair of those 'sunburst' gold-colored cyl heads, too. So for a ported cyl pair, two pistons, and heads, and a set of expansion chambers, you'll be able to piss-off all those CVO Harleys probably into triple digits. Nothing ruins a Harley's day like being behind a two-stroke blue cloud from a standing start.
http://www.bikez.com/motorcycles/yamaha_ds_7_1972.php
http://www.bikez.com/motorcycles/yamaha_r_5_f_1972.php
Thanks for the info, as far as the DS7 our thing is preservation, so we don't mod many of our bikes, but did just sell a french blue RD400 that was a screamer.
