Well the stock one works ok with the stock clutch.. but when you have a aftermarket clutch it tends to keep the cable to slack and you have to keep your foot buried to the rug on WOT high rpm upshifts or you will grind..
if you have this high rpm shifitn problems a aftermarket quad and adjuster will help because it will allow for you tighten the cable and reduce the slack.. this increases the clutch air gap and with a bigger air gap high rpm shifts will be easier to do without grinding