Front disc

[moto]

I had an advisory on my M.O.T for the front brake.
"Front roller brake test indicates slight fluctuation of the brake effort [3.3.ALD]

The tester thought the disc was warped.

What can cause a disc to warp?
My bike only had a few thousand miles on the clock.

[Paxovasa]

Excessive heat, disc lock or an accident can warp a disc.
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Suzuki GSF600 K3 (in the fastest colour, black).

[Wafer_Thin_Ham]

Binding brake calipers usually. Do they need a strip/clean?

Hard use on track can do it on some models, although that's pretty rare now.
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My Flickr

[moto]

Thanks for the suggestions, could be any of those I suppose.

Funny thing is the front brake seems really good, too good in my opinion.
I never noticed there was a warp but now he mentiones it I do think I can feel the uneveness when I brake.

I ordered a new disc, pads and SS brake line.
Maybe I should strip and clean the caliper while I am at it.

It's not something I have attempted before, is there anywhere I can read up on instructions/tips for cleaning a brake caliper?

[Wafer_Thin_Ham]

[Paxovasa]

[Teflon-Mike]

[moto]

Thanks pax, I have fitted pads before but never cleaned a caliper.
I have some WD40 so will git it a go.

Mike, it is an XT600E 4PT, single front disc.
The parts should be here in a couple of days from wemoto.

The pads have plenty of life left in them but I understood it is good practice to have new pads with a new disc. The braided line wont hurt either.

[69.9mph]

Do not use WD40 or any petroleum based product, it will damage the seals. Best to use brake cleaner or even a little brake fluid if that's not available.

[Billy Balthorpe]