Front Brakes..

Maybe some sort of ABS issue?

 

Hi. I had a similar problem on my last bike a Tuono v4, with brembo brakes. I changed the pads and gave the discs a good clean with a scouring pad. And also cleaned the buttons. That fixed the the slow speed judder.

 

Take a very close look at the discs, this can be caused by very small adhesions to the disc from the pads, usually caused by coming to a stop with high brake disc temps and parking for a length of time allowing the brake material to fuse to the disc ( especially if the brake pistons have been a little sticky ). The varying thickness of the disk is only felt at v low speeds & light applications as the difference is so small.

You could try cleaning off any slight marks with a scotch brite pad or similar

 

Had identical symptoms with mine, mentioned it to dealer at 1st year service, not really expecting anything to be done. The dealer put in a warranty claim for new discs (and pads), was approved and fitted a couple of weeks later. I've not had any further problems a year or so later. It's either very slight warping or I've also heard claims that uneven surface glaze of some description can cause it (which might be cured by a dose of heavy braking to remove surface?).

So no, it's not an ABS problem IMO.

Don't forget to post here if you take it further and get it sorted, it's looking to be a relatively common issue.

Edit:
Oldyam/Madmatt 's suggestion might be worth a try (mine was one oscillation/slight increase in braking per rev of wheel only at speeds 5mph or less, so wouldn't really describe as a judder). I had tried cleaning/rotating the bobbins without any effect, tried brake cleaner on disc surface but not scouring pad as they looked perfect/no discolouration.
Like you, as the issue was so slight I nearly didn't bother mentioning to dealer, so hats off to them. (I'm usually slagging dealers off for shoddy work )

 

I found a fairly large flat blade screwdriver pushed into the bobbin would turn it enough to free it and a shot of brake cleaner expels any crud.
If the bike is going to the dealer ask them to put it on the brake roller used for MOT testing, that will show up any pulsing as the wheel only turns quite slowly and should be a perfect test for your symptoms.

 

Another possibility, the Head stem bearings have come loose ! I replaced my standard roller head stem bearings with tapered, as I had similar issues, brake's weren't touched ! But the shuddering and such at low speeds when braking disappeared.

Cheers capt

 

Absolutely this. Before I collected my bike from the dealer it failed the MOT on brake pulsing even though nothing could be felt at the lever. New discs and pads.

 

Agree with col_c. Had exactly the same issue. Took it in for 12month service on Saturday and explained the problem with braking. Mechanic took it out for a couple of minutes then confirmed warped discs. Being replaced under warranty.

 

Agree with col_c. Had exactly the same issue. Took it in for 12month service on Saturday and explained the problem with braking. Mechanic took it out for a couple of minutes then confirmed warped discs. Being replaced under warranty.

 

This is looking increasingly like a common problem, don't forget to put a brief post here

 

My 2012 (8k miles) was recently MoT'd and to my shock the tester picked up the front brake discs as grabbing. I was present when he tested the brakes and it was very evident from the needle on the brake test gauge jumping up and down whilst using light front brake. He cleaned the discs but the problem was still there. As the bike was out of warranty I had to fork out for some new discs. I opted for some new EBC discs as the Triumph discs seem to have problems, I know of another Speed R rider that has gone through two sets of front discs!