As far as I'm aware with the fork tubes <10mm from flush with 27mm @ 23.5 the front wheel will clear the oil cooler, just. For track bikes, everyone I've aware of that's tried to run 23.5deg w/<30mm has cut the crap out of the chin to get clearance. I'm running Sharkskin's with 27mm and never have been able to get the steering set at 23.5 to clear the lower chin, even at 24.5 it still rubs under heavy breaking tipped in. Never fully investigated moving the oil cooler back enough to clear for fear bodywork will fit like crap. Runners will prevent the upper from moving back, cluster will interfere with the windshield, fairing stays will require bending, new DZUS holes for both upper & lower and the list goes on. My suggestion would be before your next track day pull the bodywork, set the rake at 23.5 and spend the day with it. By the end of the day you'll probably know if its worth the effort.