Originally Posted by kerhonky
This is the point that everyone else seems to have missed. If your bike will do a "stoppie," as most bikes will, then you can get 100% of your braking power out of your front tire. It's just a matter of learning where that threshold is and being able to stay just under it reliably.
Until your girlfriend becomes an expert at stoppies though, she should be advised to practice emergency stops using both brakes.
lots of bad advice here . threshold braking with both brakes should be done every ride. it should be automatic. most bikes are not sport bikes . most bikes are cruisers and standards. also to the op a klr front brake is more than adequate you just need a strong hand.