I had the same problem X2...out of the warranty period and the dealer replaced them (discs) for free the first time....second time after seeing that triumph still hasn't been able to fix the problem (forum posts) I decided to put the aftermarket discs on...so far no problem w/ the ebc's (only about 500 miles)...I rode around w/ pulsating front brakes for 3 years and developed some really bad braking habits...one way or another get it fixed