Jim, my first day ever on the 01 stuff, I was matching my times set on the 99. Buttonwillow was slick that day so it may have favored the 01’s. Honestly I think the 99 is a pretty good cylinder for a gripped up buttonwillow. Always plan on back to backing them on a race weekend but just never have the time.
I did a back to back session at Tucson last year, wasn’t even close. Don’t remember the exact time difference but I boxed up my 99 cylinder and put it in a cabinet labeled “road racing” lol.
“I think the timing should be backed down on the 01”
Prob only good solution if you want to keep the 99 in the game.