My clutch switch wasn't even hooked up so the bike would barely rev past 12k and the suspension was soo badly setup my tires were ruined after 2 days. At the high 20's level it's the rider, not the bike. There's no reason a modern sport bike can't run a 1:25. I see a 90's 600 as modern enough.
Ran a 1:23 on a bone stock 04 ZX6R on my 2nd track day on two year old BT016s. Yeah at 1:28 its not the bike