Okey dokey gents!!

:rant:rantRighty ho'! well i brought the bike to work this morning, took it very steady due to my front wheel issue. Got here safe and sound BUT i have spent this morning (thankfully no fire calls so far!!) checking over the front end. There's a Fire Service mecahnic here today (who's clever with bike, building his own at the moment!) and so he's been helping me out too.
So far i've;

1) Spun wheel again to show "Fergie" what was happening, binding badly!
2) I then removed the pads form the left caliper, binding badly! So refitted.
3) Then removed right pads from caliper, aha!! spinning freely!!
4) So, we've now worked out it's the right hand side causing the problem.
5) We've now checked the pistons on the right side and all moving freely.
6) Put pads back in then quick spin round the yard, back into garage area, bike on stands, try to spin wheel and........binding like a *******????!!! Plus the right discs was absolutely roasting hot, left barely warm! :rant

After all of the investigating, both myself and fergie have agreed that there must be a problem with the disc, i've emailed ABE (All Bike Engineering) to ask if i can send them it down for a thourough check as it was those guys who re-bobbined(??) my discs.

I'm having to leave the bike here now till it's fixed as i'm not running the risk of riding it home.

Can anyone think of anything else i have missed, or would you say that the conclusion sounds about right????? ****** off now as the weather is nice here today......:rant:rant:rant

Cheers guys............:thumbup

Yep..either warped disc or it's not fitted flush. Have you tried removing the disc and see if theres anything under to stop it sitting flat :dunno Could you swap disc's over to see if the fault moves to the other side :dunno you'd definately know it's the disc then if it does.

Try using the old pencil/marker trick on the disc Andi. Tape it onto the caliper/fork leg so the tip just touches the disc and then rotate the wheel gently round and see if it draws a line all the way around the disc, or there is a break in the line, or alternatively gets stuck. If it gets stuck, then move the wheel back to the start of the line, wipe off the line, move the pencil/marker back so it is almost touching the disc but not quite, and then try again. Should give you an indication as to whether it is warped or not, or alternatively as Sprocker says, if the disc itself is not sitting flush.

Have you bled the front brakes of late?

sprocker said:

Yep..either warped disc or it's not fitted flush. Have you tried removing the disc and see if theres anything under to stop it sitting flat :dunno Could you swap disc's over to see if the fault moves to the other side :dunno you'd definately know it's the disc then if it does.

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Yeah bud, removed the discs a couple of nights ago to check they were seated properly, and all is ok. Gonna try swapping them over tomorrow as got to go to a town fete with the fire engine this afternoon, soooo inconsiderate of them....:devious

I'm hoping ABE will take it back to have a look at, don't have a receipt or anything other than getting bank statement to show payment so fingers crossed they'll look.

Pain in the arse.......:rant

caterpillar said:

Try using the old pencil/marker trick on the disc Andi. Tape it onto the caliper/fork leg so the tip just touches the disc and then rotate the wheel gently round and see if it draws a line all the way around the disc, or there is a break in the line, or alternatively gets stuck. If it gets stuck, then move the wheel back to the start of the line, wipe off the line, move the pencil/marker back so it is almost touching the disc but not quite, and then try again. Should give you an indication as to whether it is warped or not, or alternatively as Sprocker says, if the disc itself is not sitting flush.

Have you bled the front brakes of late?

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Cheers bud, yeah, the mechanic has an actual tool for checking warped discs and there was only very, very slight undulations in the discs which he reckons the pistons would easily compensate for. Haven't bled the brakes this year yet so will do that tomorrow too, discs are seated ok too.........:rant

Being one for the simple things in life, i'd go for bleeding the brakes through and seeing whether it makes a difference in that case Andi :thumbup

Swap you for a blown Ohlins fork seal

just thinking out loud here - wonder if the wavey disks can be rotated on the carriers or if they are only able to rotate one way, if this is the case and ABE may have installed it back-to-front then this may cause the prob .......... or .............. if the disk is bedded in one way does this offset it through wear and then when installing b2f this then creates an offset (still that'll be an issue for ABE I guess).

C

dangleebals said:

just thinking out loud here - wonder if the wavey disks can be rotated on the carriers or if they are only able to rotate one way, if this is the case and ABE may have installed it back-to-front then this may cause the prob .......... or .............. if the disk is bedded in one way does this offset it through wear and then when installing b2f this then creates an offset (still that'll be an issue for ABE I guess).

C

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Clyde mate, i dunno??? I'm going to swap the discs over tomorrow and see what happens then, fingers crossed it'll sort it......but then again nothing's ever that fecking easy!!!

ain't that the truth mate - check and see if the disc hangs over the carrier edge more on one side than the other

c

I had a problem with my 2003 disks just touching but due to the heat during driving the oil and disk expand so after a couple of miles it got dangerous.
Found out that there is a small hole in the master cylinder to let the pressure off when releasing the brake which was blocked.
So I would say clean you’re master cylinder.
Of cause if you only had this problem since you had you’re disk worked at you don’t suspect that.
Are you 200 % sure the fitting surface is clean?

DrRossi mate, i'm sure they're clean as i spent 20 mins on each side wiping both surfaces!! I'll have a look at the master cylinder too..........cheers for that!

Clyde......both discs sit flush with the carriers so no solution there!!:bawling

What did your mate check with his tool Andi, it sounds a bit like a bent carrier to me, which can be straightened, i have seen many carriers done whilst tyre changing, any reasonable amount of pressure on the disc can bend the carrier (the centre bit of the disc), that would show up with Cat's pencil test on the fork leg.

Iain mate, it was a tool that secured to the fork (well actually the inside of the spindle) it expanded to "wedge" itself inside it. It has a guage on it in mm's that moves when the end of the telescopic "rod type" thing is pushed inwards, then you get a reading in mm's of the movement, if that makes sense??? There was very very little movement bud. It's looking like the carrier like you say or the disc itself but am unsure as to which??? As i'd have thought if it were warped the guys at ABE would have let me know before doing any work to them........****** if know bud!!!

Gonna try the discs on opposite sides tomorrow and see if the problem moves with the disc????

Guys, as stated earlier in the thread, i'm going to swap the discs over and see if that helps. Question is, can i just take the wheel out, spin it round then re-attach it to get a comparison? Or is there sometnig that will prevent this from happening (ie does the wheel only go in one way?) Obviously if it works i'll need to swap the discs as the tyre is directional but for quickness sake can it be done?

:thumbup

You could have a caliper that is not releasing back if you put a spacer in between pistons and let then pump them out clean them with brake cleaner and grease them with girling brake grease round the outer edges.
If you work the pistons in and out a few times to make sure they are working freely because if you have been riding in the winter time with the salt etc they can corrode and stick
As it is only one side it must be that caliper that is binding if it was warped or out of line it would bind in some places and be free in others

Cheers Mick.........can you tell me an alternative grease to use as want to do it tomorrow but most places are shut, copper grease any good???

Yes copper slip will do the job as well:thumbup

andirsv said:

Guys, as stated earlier in the thread, i'm going to swap the discs over and see if that helps. Question is, can i just take the wheel out, spin it round then re-attach it to get a comparison? Or is there sometnig that will prevent this from happening (ie does the wheel only go in one way?) Obviously if it works i'll need to swap the discs as the tyre is directional but for quickness sake can it be done?

:thumbup

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no bud cannit be done - hub centering is slightly different iirc there's actually an arrow showing the direction of travel so that its not installed b2f

c

dangleebals said:

no bud cannit be done - hub centering is slightly different iirc there's actually an arrow showing the direction of travel so that its not installed b2f

c

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Yeah,kinda thought that C mate!! *******!!!:thumbup

Would a poorly bled front brake on the right not give the proper realese pressure??