The part named was that little muscle above the knee cap that hurts while you are learning to ride a recumbent.
I'm informed by somebody who ought to know that it is the Vastus Intermedius and mine was hurting after only 2.5 miles yesterday. I don't want good recumbenter's legs. What I want is electrification, so today I have stripped the Bacchetta, cleaned and regreased every nut, bolt and thread, changed the front tyre for a Marathon and readied an Alfine 11 rear wheel to fit tomorrow.
Hopeful of getting the motor in tomorrow but not running. There is bound to be a bit missing or broken.
I have found two Bacchetta Giro 20's that have had Bafang FUN8 motors fitted. One in Oz and the other in the States.In both cases the motors have been transferred to other machines. I'm not sure if there is a lesson to be learnt there.