else one or a couple of the pistons in the caliper are sticking. A warped disc tends to show up however hard you brake, but if it's slow speed only ie light braking, then it could be a piston or two. There are no dust seals on them, and they aren't rebuildable, so take them off, remove the pads and give them a really good clean. Forcing the pistons out a way without the pads fitted will give you more of the piston to clean to. After you've done it, spray a little lube (WD40) or better still smear a little brembo brake grease around the piston and push them back in.
Agree with Ian, that's probably the most likely cause.
I had the same on my blade last year, changes the discs and the pulsing dissappeared. Measured the runout on the old uns and there was the tiniest of error but holy cr4p did it come through the bars!
listen to Nelly He's got more Duc knowledge in his little finger than Ive got in the whole of me Many of us leave our pride and joy (the bike, not the wife, doh) with Nelly to work on and breath a likkle of his mystical magic into. Im having a topend and hi comp piston job done at his place, and beleive me, my bike's just a 900ssie, and when you see him working on a 996 or a 748, then that IS a wonder to behold Listen to Nelly rgds mort
cheers ppl for all the info, got it checked out on its first service and they concluded a warped disc and are ordering 2 up for me just in case. As far as seazed pistons go, I actually checked and cleaned but still made no ods as the pulsing is very light at higher speeds, probably due to the frequency.
Also another quick question for you ppl, since the service Ive noticed slightly higher running temps and the idling speed has gone from 1k to about 12k or there abouts is this normal?
where do you live. If its in the Northern Hemisphere and above Watford Gap, a trip to Nelly's will sort you out. OK enuff of the advertising (and Im not on commission) as the man and he'll give you a response, Im sure rgds mort
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