They listed the disc as a option , before std fittment . Probly supplied 10 sets to cover the whole of the U.S.A.
Above 80 mph a disc proves its worth , hardly a reason to put you off . Try a few wheelies and see if the front wheel falls of , when you put the brake on , to see if its any good , Theory was warm up ( 10 minutes run ) then redline , full brakes , a few bumpy bends listening for clunks or debri , BEFORE parting with hard earned cash .
If you havnt seen if itll withstand how you inteend to use it , you dont know if it will .
First Q. owner if its ' safe to redline ' .
If the suckers still running in , or tight , a bit more time spent feeling out its characteristics is called for . Heat Soak or not to heat soak .
Under 1.000 miles its notta brilliant idea . Oil Circulation & engine noises at full operateing temperature are worth a listen .
Should all be musical pices in motion , rather than rocks in can type noises .