BSH - Fran's Yam trike

Ian at Hyper Trikes reworked the back end of Fran's trike with an IRS set-up and air-ride rear suspension, and's absolutely transformed it!

[@jamesweber4938]

How are the rear wheels driven ? I think the Yamaha 1100 achilles heel is the shaft drive ? I like the trike but its too loud for my taste. Did it pass the Spanish MOT ?