I only saw the HRD and it was going sooooo slow and I was overtaking in a van, if my non googled recollection serves me. wasn't HRD something like Howard Robert Davis TT winner who briefly made his own brand bikes before Phil took over. But I think the HRD on the tank was deleted after the difference of opinion ( WW2).
From the rear is looked to be giving a very hard ride...almost rigid....but I'm sure they pioneered the single point under seat springing that was " invented" by Yamaha in the 70's LOL.
Bookmarks