first off .. girls that ride are hot!!!
basically its not really how big the bike is its what fits you. all bikes are made to fit everyone. they can be adjusted. so really you just need to look at power.
if you havent been riding for long then maybe somthing not to strong. etc.
hope this helps.
p.s i have a hyabussa turbo. it halls a$$!!!!! up to 230+mph
