Good news about Thumper! It passed its MOT today after extensive mechanical work. Isetta's are very over engineered, two suspension swing arms each side one to hold the wheel hub, the other holds the brake back plate, I had to rebush them all with bronze bushes and reamer them out to fit as well as king pins/ bushes. Replaced all steering bushes, both bronze and rubber. I discovered that many isetta owners do not nip up tight the rubber silentblock bushes but let the pins rotate inside them, the pins are not made to do this , all the movement should be in the rubber flexing, a little slack in each of these joints all adds up to a big chunk of free play at the wheel,no wonder Isetta steering has a poor reputation, its down to the owners letting it all wear out and not setting up correctly! Ok, with it all back to as new its not as sharp as some cars but boy what a difference with it all done! I think me and thumper are going to be happy together.
