I'm in the process of rebuilding a 72 norton 750 for a great friend of mine who's helped me along my career....hes about to retire and hasn't ridden since 1978...thats how long this bike has sat abandoned in a garage after if wouldn't start....ive got the bike running "well" rebuilt the motor and updated a bunch of stuff....just got new tires (original tires are are actually nice....wondering if there value keeping them in case the bike gets stores for another 35 years)