My three Bullets are happiest at 45-50 MPH,however,I've had them all past 70 MPH (indicated)...the previous owner of my 2000 rode it back and forth to and from work,on Interstate 10,and he swore that it would do 70-75 MPH all day long...BUT...it's far from stock,with higher lift cams,an 8.5:1, higher compression piston,taller gears for less low-end torque,and higher cruising speeds,and a RF shift Albion gearbox,as God,The Queen,and Tony Wilson-Jones intended...I have no doubt that she'll do it,but these fine motorbikes were designed for English B-roads,in the 1940's and 1950's,when there was no need to go faster than 50MPH...BTW,70+ on a Bullet feels like you're breaking the TON...and Avon Speedmasters,and Safetymileage tyres are NOT what I'd want to be on,going that fast...new,modern formula Dunlop K70's would make me feel a bit safer,especially in the rain...