THIS CAM HAS VERY LITTLE EXTRA LIFT,(LESS THAN .5MM) BUT A LOT MORE DURATION!!THE "DURATION" IS HOW LONG THE VALVE IS LEFT OPEN,, AND THE LONGER THE VALVE IS OPEN THE MORE FUEL/AIR MIXTURE GETS IN THE CYLINDER,, SO MORE MIXTURE MORE POWER !!!THIS IS MORE OF A LOW AND MIDRANGE TYPE CAM,, AS FAR AS THE POWER BAND GOES.. OF COURSE THERE WILL BE SOME TOP END BENEFIT'S AS WELL !!!THIS WILL FIT RIGHT IN WITH NO MODS NEEDED, AND WITH VERY LITTLE EXTRA LIFT THERE IS NO NEED FOR STIFFER VALVE SPRINGS...THIS CAM WORKS ON ALL CT90'S ATC90'S ST90'S CL90'S S90'S CM91'S AND SOME OR ALL ATC110'S BUT (NO CT110'S SORRY) THIS GREAT ITEM IS IN STOCK IN ODELL NEBRASKA READY TO SHIP OUT ASAP AS ALWAYS IN STOCK AND FREE SHIPPING FROM NEBRASKA IF YOU NEED MORE RELATED PARTS ? SEE BEATRICE CYCLE'S EBAY STORE WE ONLY SELL REPLACEMENT PARTS FOR SINGLE CYLINDER HONDA BIKES TRIKES AND QUADS!!