I am cut and pasting this from a Facebook group, rather than giving a link, as I know some of you don't like dabbling or getting involved in "social media".
" The Twingle as its affectionately known is a T100a 500 Triumph that has been taken out to 580cc. The cams have been re profiled so that both cylinders fire together to run like a single.
It's running 14-1 compression on methanol, high output oil pump, Interspan Twin spark ignition. The bike also has a V5 so it could easily be returned to standard for use on petrol and put on the road.
The bike was ridden successfully by Joe Maxwell and his son Scott. Also my father Mike Barnes campaigned this at the Bonanza where Triumph development engineer John Giles had a test ride on it as he was the original man to come up with this concept.
All enquiries and for more information please contact Joe Maxwell on 07836209886 or email joe@joemaxwell-engineering.com"
OH! It is for sale! (I have no connection.)
Good health, Bill