| I have to agree with Jon, Andy and Tim's views.
620s' are much quicker, in the right hands, ex racers - Geoff, Cobby, Dom, Hawk etc (look at the records)... or those who have spent a few years learning how to ride them - Rattler, Andy. Very FEW amatuer racers, have transitioned from 583 to 620 quickly and easily.
Personally on my 583 I could be very direct and (clumsy?) when riding it and hussle it about. The 620 required more finnese? as it was going much faster, as Jon said, at the critical points of braking and in sweepers ie Assen or Cadwell! 5th gear flat out up Charlies on the 583, no problem? on the 620, clench sphincter!!
620's are more on the limit of tyres I agree completely.
I have ridden a number of 583's and 620's. IMO for a newbie, the 583's are easier to ride well, by virtue of their setups. The 620's are more difficult to ride quickly as you need much more confidence and learnt ability.
For me class A is just having a rest.
Leave it well alone and go race.
You, lucky, lucky, b4rstards.  |