i patch worm on my racetech k2 1week b4 trackday n i join d 5lap challenge n my fastest laptime that time on my r1 is 1.45 n i dun find any problem wif the patch.. everything feels normal n the grip was as b4... n im an agressive rider.. u can ask msf67... wats important is dat u muz let the worm totally blend wif the shape of ur tyres... i myself wudnt go to track if my tyres is freshly mended... juz my experience...
cheers!