My 1999 Kawasakizx750R's high beams just went out on the road,but low beams still work. Is there maybe a fuse to look for? If so, where is it located?

Maybe a fuse but more than likely the bulbs are burnt out and need replaced.

Defective head light relay, Or broken wires ,

more than likely your switch went bad.
if fuses are good, maybe replace switch with a junk yard part first possibly..quickest and easiest remedy for the next step...if one is needed..

maybe a fuse the fuse box is under the drivers side passenger seat . sometimes ive seem them get something spilled on them and i had to wiggle the fuses to clear the corrosion

I would check the low beam fuses. Also maybe a bad dimmer switch. Check to see if you have power at the low beam headlight plug.

check fuses for low headlight fuse blown highly unlikely both bulbs went out at once.

Well I would certainly check the fuse because that both lights burned out. If only one had burned out I would replace the bulb. If the fuse is good I would purchase 1 bulb and see if the new bulb works. Often times people will replace both bulbs because they come in 2 packs cheaper than singles. This also can cause both to burn out at the same time. Check the fuse and then replace a light, if replacing one light works replace the other, this should cure the problem.

I don't know if it will be very helpful (maybe not if both low beams went at the same time), but the fuses for your low beams are in your under hood fuse box: fuse number 1 (10A) left headlight low, and fuse number 6 (10A) right headlight low. Maybe it's not likely that they would both go at once, but I would check them.
Then, of course, it could be the bulbs.
Last, if not one of the former, then it becomes a matter of having relays and switches checked (not something you really want to do yourself).
Hope this is helpful.

If i am correct, You have a fuse for low beams...Silly huh....... Well give it a check and you will se that you ahve fuse for high beams and low beams. Good luck.

Check the low beam relay . Look here for location http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on electrical distribution , then under subsystem click on relay . Click the search button then the blue link . Look at left side near the bottom ,HEAD LP LO . Right above #5 and #4 fuse's . Do you know how to test at relay base ,that's where it plugs into. Watch this video .
VEHICLE RELAYS Operation Diagnosis