Advice/assistance with brakes. Dartford area ish

[P.]

Hey

I've hit a brick wall with the GSXR. The front brakes seem to judder when you apply them, I bought new disks, they do the same.

I've not actually done much aside from get them swapped but it's got to the point where I'm not going to ride it with scary ass brakes.

I can't get it up as I have no stands currently. My only option would be to remove everything and lay it down.

I'd just like a second opinion/test rider/help as whilst I feel I could sort it, I'm stuck as to what the issue is.

[Pete.]

Get your arse round to mine this afternoon.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[P.]

[Nobby the Bastard]

Had the same issue with my rg 125. Never found the cause but came to the conclusion it was either a buckled wheel or badly seated bearings.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[chris-red]

Corrosion where the disks mount?
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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
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[Nobby the Bastard]

[P.]

I'd hope it's not corrosion, I've tried to baby this bike. All it's work has been done in a garage so far. I should have returned to the garage when it was done but tax and insurance lapsed, then work, then home etc.

Shit as really .

[Fisty]

The TL had this when I bought it, it was corrosion behind the discs, roadsalt being the culprit.

Popped the discs off, cleaned everything up an reseated them.
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Quietly and consistently taking the piss.
TL1000R | Hayabusa | ZXR400 | TL1000S | Bandit 400 V
Fatter and faster than Fret

[G]

How are the wheel bearings?

It's common for ones on the way out to first manifest a noticable issue under braking.

[P.]

[G]

That's exactly how knackered wheel bearings can feel!

Not knackered enough to notice when they're under less pressure, but when you add significantly more forces from the brakes it gets bumpy - and that bumpyness than transmits through to the lever.

I've only had it myself once, but an R6 wheel I sold, someone complained of just that too and initially couldn't work out what was wrong with the braking system - turned out it was needing new bearings.

Not saying it is, but definitely worth checking!

[Fizzer Thou]

I worked on a 4XV R1 a while ago and the owner complained of juddering in the front end under braking.He took the bike to his local bike shop in Wandsworth and they said that the headrace bearings just needed tightening.But after a track day at Brands the situation arose again,most probably due to the different conditions that a track imposes on a machine.

Knowing that Suzuki use very little grease on assembly at the factory,I would also look at the condition and adjustment of these bearings.

Is it worth changing the fork oil while you are about it?It is not like the factories to use a quality oil and even after 5,000 miles the oil goes distinctly thin and damping suffers accordingly
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Just talk bikes.What else is there?

Always have a 'Plan B'

[Pete.]

Paddy popped round this morning. Turns out that one of the new disks isn't the same thickness all the way round. I've seen this before with aftermarket disks.

I measured the LH disk and it was 0.061mm fatter one side than the other. The RH disk was only a couple of digits different all the way round. So we put a clamp on the LH brake line and Paddy took it for a test - it was braking smooth as silk.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Sister Sledge]

Kin ell.
I've never heard of that but it does piss me off - brakes are the most important thing on a vehicle and there you are - shit from the factory.
Are they a recognised make??
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CCM 404 DS

[P.]

Just updating this.

Popped round to Petes today with new disks and (sorry....) a tyre to replace.

The bike is now 100% perfect.

I'll attach pictures once they load, but essentially the disk bolts were well stuck in there which meant I needed Pete's help to undo them, and Pete needed tools

[P.]

https://i.imgur.com/h4SvN27.jpg

https://i.imgur.com/XRLV2Rm.jpg

https://i.imgur.com/aEod72c.jpg

[Pete.]

Those bastards put so much threadlock in there it wicked up onto the bolt shoulder and effectively bonded the bolts into the thread, the disk and the counterbore. Even my mains-powered impact wrench struggled with a couple of them.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[colink98]

[Easy-X]

With that sort of attitude I'm surprised they didn't just skip to epoxy!
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[P.]

[Pete.]