dRAG MACHINES USE AIR SHIFTERS,ELECTRONIC BUTTON ON THE HANDLEBARS,THE ENGINE GETS CUT JUST BEFORE ACTIVATION ALOWING FOR CLUTCH FREE OPERATION.Speed shifting,But that is strictly upshifting,and the use a lockup clutch that does not slip at all.
I myself don't use a clutch all that much,only for downshifting.And when winding it out high rpm.
Good way to blow up a tranny if not done propper.
On my streetbike cruising i rarely use a clutch at all,thousands of miles no issues.your call tho as it will damage things.I belive a streetbike is mor forgiving but offroad machines,use the clutch,save the money in teardowns.
Buddy o mine put a 600 hp big block in his 67 GTO.was doing a burnout and obliterated his 4 speed hitting 2nd gear at 5k rpm.wasn't pretty.you be the judge lol