I bought a 1994 VFR750 in decent shape a few weeks ago as my first bike and fixed it up with a buddy and its been great to ride since I got it running and street legal! But today on a ride I noticed something for the first time. At higher speeds if i grab the front brake rather hard the front of the bike starts to vibrate or shake. Is this likely a warped front rotor? and if so, any way to figure out if its one or both rotors? I mostly have used the bike to ride to and from school since i got it running so i had not noticed it till now, today was only the third or so time i really took it out on some fun roads with a buddy and got up to higher speeds and turns that I really needed to hit the brakes. Thanks in advanced for any help!
You could get or borrow a dial indicator with a magnetic base and tell exactly how much runout your rotors have. You could also take something that will compress and not recover and fix it to your fork leg and see how bad the total run out is by mesuring the biggest gap after a full roation or two. First thing that comes to mind is an extensible radio antena. Check both sides and you'll find your issue, one side or both.
