HI HECTOR
YES MY DAYTONA HAS THE REV COUNTER FITTED,AS THEY SHOULD HAVE ,THE COUNTER DRIVE IS ON THE LEFT HAND SIDE CRANKCASE JUST BELOW THE EXHAUST,DRIVEN BY THE EXHAUST CAMSHAFT,ENGINE SHOULD BE STAMPED T100T FOR THE UK MODELS AND T100R FOR USA BIKES.
HOPE THIS HELPS,IF YOU CAN GIVE ME YOUR E.MAIL ADDRESS I WILL SEND YOU A PICTURE OF MINE.
CHEERS
STICKS
P.S SORRY ABOUT THE CAP LOCKS