I agree. Ageing tires won't properly represent the bikes handling capabilities. It's always good to know the baseline in a new relationship. Shinko makes a good tire. Great maybe, for the niche they're in. I have them on 2 bikes, a dual purpose and a 650 vintage "scrambler". Both bikes rarely see 60 mph. I would not put them on my fast-n-fun bikes. Both Guzzi have Avon at he moment, and the FJ09 has Dunlop Roadsmart.