Takanta Posted September 14, 2011 Share Posted September 14, 2011 ello folks,just wondering what yer opinions are on my front brake discs, I havnt ridden my bike for about a month. ill admit the last time i used it was out in the pissing rain wind, the lot. for work and I jsut put it back in the shed to sit for a month .anyway took it out today and i noticed my discs to be in a bit of a mess , heres pics.not really sure what to do , do i need to replace them or? looks like rust mainly around the holes and where the brake pads where sitting against them for a month.http://i29.photobucket.com/albums/c262/jaffa15/14092011020.jpghttp://i29.photobucket.com/albums/c262/jaffa15/14092011019.jpghttp://i29.photobucket.com/albums/c262/jaffa15/14092011018.jpghttp://i29.photobucket.com/albums/c262/jaffa15/14092011017.jpghttp://i29.photobucket.com/albums/c262/jaffa15/14092011016.jpgany help would appreciated Quote Link to comment Share on other sites More sharing options...
Matt Strange Posted September 14, 2011 Share Posted September 14, 2011 Usually they will have a minimal thickness, often referred to as a 'service limit' in workshop manuals. ideally you'd measure this with a vernier caliper.They don't look that bad, just surface rust that'll soon wear off with a bit of use. As long as they don't have really deep scores in them, warped or gone oval they should be fine (as long as they are thick enough of course!).Make sure the calipers aren't seized though!. Quote Link to comment Share on other sites More sharing options...
TC Posted September 14, 2011 Share Posted September 14, 2011 They look ok TakAs Matt has said Check the thickness and make sure they are not warped. That discolouring will wear away in no time. Quote Link to comment Share on other sites More sharing options...
Stu Posted September 14, 2011 Share Posted September 14, 2011 dont look too bad to be honest ive seen worse on an 08 plate bike Quote Link to comment Share on other sites More sharing options...
Colin the Bear Posted September 14, 2011 Share Posted September 14, 2011 The rust will disappear the first time you brake. Quote Link to comment Share on other sites More sharing options...
Tango Posted September 14, 2011 Share Posted September 14, 2011 Your disks look a bit scored/worn.....so as above, check the thickness of the disks. If the disks are warped they will bind in one place if you spin the wheel. The surface rust is nothing to worry about.....as CtB says first time you use the brakes it'll disappear. Quote Link to comment Share on other sites More sharing options...
mealexme Posted September 14, 2011 Share Posted September 14, 2011 using them over and over should get rid of most of the rust. If you are worried about them then give them a clean (NOT with anything that has even a hint of grease.. I learned this the hard way once when using WD40 near one of my brakes... it scared the fook outa me the fist time i tried to use them!)they dont look warped or anything, but if they were you would feel a difference in the bike especially under acceleration and braking if its severe enough (brake lever will not be smooth. Not a great description, but you will know what i mean if you ever encounter it) Quote Link to comment Share on other sites More sharing options...
Takanta Posted September 14, 2011 Author Share Posted September 14, 2011 thanks for the reply folks, used bike today for work and while braking using the front it feels the same , as when i first got the bike and when all that crap wasnt there.not long home so cant check the condition of the discs to see if the surface rust is gone as its too dark, gonna give bike a wash tomorrow if the weather allows me to. 2 weeks time is my MOT so I assume they check the discs anyway? and ill soon know if there fooked or not cus theyll fail it haha. Quote Link to comment Share on other sites More sharing options...
Bogof Posted September 14, 2011 Share Posted September 14, 2011 they dont look warped or anything, but if they were you would feel a difference in the bike especially under acceleration and braking if its severe enough (brake lever will not be smooth. Not a great description, but you will know what i mean if you ever encounter it) I'm genuinely interested by your comments above, since my experience of warped discs is minimal. So how can you tell they don't look warped from the pictures that were posted, and how would you be able to feel a difference under acceleration? I can understand how it'd feel different under braking, but acceleration just confuses me. Quote Link to comment Share on other sites More sharing options...
Jonabonospen Posted September 14, 2011 Share Posted September 14, 2011 they dont look warped or anything, but if they were you would feel a difference in the bike especially under acceleration and braking if its severe enough (brake lever will not be smooth. Not a great description, but you will know what i mean if you ever encounter it) I'm genuinely interested by your comments above, since my experience of warped discs is minimal. So how can you tell they don't look warped from the pictures that were posted, and how would you be able to feel a difference under acceleration? I can understand how it'd feel different under braking, but acceleration just confuses me. The same thoughts were going through my head when reading that but I wasn't going to put it in writing Back to the point. It is just a little light surface rust that has formed while the bike has sat and there has been water between pad and disc. Nothing to worry about. You say the MOT is due in a couple of weeks and you assume they will be checked - they will not check your brake disc thickness on an MOT. That is part of your servicing / maintenance regime for the bike. Don't be fooled in to thinking an MOT covers all safety type things. They have a set list of things to go through and that is all you will get, no more, no less, and not all things you would perhaps think would be on there are actually on there. Quote Link to comment Share on other sites More sharing options...
Jonabonospen Posted September 14, 2011 Share Posted September 14, 2011 they dont look warped or anything, but if they were you would feel a difference in the bike especially under acceleration and braking if its severe enough (brake lever will not be smooth. Not a great description, but you will know what i mean if you ever encounter it) I'm genuinely interested by your comments above, since my experience of warped discs is minimal. So how can you tell they don't look warped from the pictures that were posted, and how would you be able to feel a difference under acceleration? I can understand how it'd feel different under braking, but acceleration just confuses me. The same thoughts were going through my head when reading that but I wasn't going to put it in writing Back to the point. It is just a little light surface rust that has formed while the bike has sat and there has been water between pad and disc. Nothing to worry about. You say the MOT is due in a couple of weeks and you assume they will be checked - they will not check your brake disc thickness on an MOT. That is part of your servicing / maintenance regime for the bike. Don't be fooled in to thinking an MOT covers all safety type things. They have a set list of things to go through and that is all you will get, no more, no less, and not all things you would perhaps think would be on there are actually on there. Quote Link to comment Share on other sites More sharing options...
Stu Posted September 15, 2011 Share Posted September 15, 2011 The same thoughts were going through my head when reading that but I wasn't going to put it in writing why not? you could have put someone straight on what to look out for and educated them a little Don't be fooled in to thinking an MOT covers all safety type things. They have a set list of things to go through and that is all you will get, no more, no less, and not all things you would perhaps think would be on there are actually on there. this reminds me of a guy at work he had his car MOT done then a few weeks later his cam belt snapped and he was kicking off because the MOT place never checked it Quote Link to comment Share on other sites More sharing options...
Tango Posted September 15, 2011 Share Posted September 15, 2011 If the brakes are binding or the disks are warped they'll see it on the brake tester on the MOT.... Quote Link to comment Share on other sites More sharing options...
Jonabonospen Posted September 15, 2011 Share Posted September 15, 2011 The same thoughts were going through my head when reading that but I wasn't going to put it in writing why not? you could have put someone straight on what to look out for and educated them a little It was more the way it was said, with the sarcasm, that I personally wouldnt have said Quote Link to comment Share on other sites More sharing options...
Bogof Posted September 16, 2011 Share Posted September 16, 2011 The same thoughts were going through my head when reading that but I wasn't going to put it in writing why not? you could have put someone straight on what to look out for and educated them a little It was more the way it was said, with the sarcasm, that I personally wouldnt have said There was nothing sarcastic in what I typed. Are you maybe confusing sarcasm and irony? Quote Link to comment Share on other sites More sharing options...
Jonabonospen Posted September 18, 2011 Share Posted September 18, 2011 It was more the way it was said, with the sarcasm, that I personally wouldnt have said There was nothing sarcastic in what I typed. Are you maybe confusing sarcasm and irony? Nope, definitely not confused. Give me a brake will you Quote Link to comment Share on other sites More sharing options...
mealexme Posted September 19, 2011 Share Posted September 19, 2011 they dont look warped or anything, but if they were you would feel a difference in the bike especially under acceleration and braking if its severe enough (brake lever will not be smooth. Not a great description, but you will know what i mean if you ever encounter it) I'm genuinely interested by your comments above, since my experience of warped discs is minimal. So how can you tell they don't look warped from the pictures that were posted, and how would you be able to feel a difference under acceleration? I can understand how it'd feel different under braking, but acceleration just confuses me.sorry for the late reply, I haven't looked on this thread for a while.TBH I cant tell from the picture, they just dont look like they are in bad shape i s'pose. I had a warped disk on the front, and it was so warped that it was rubbing when it went round, so the acceleration wasnt smooth, something i really only noticed when accelerating (speeding up) or braking. I didnt really notice it when sticking at the same speed (not sure why that is though) Quote Link to comment Share on other sites More sharing options...
Bogof Posted September 19, 2011 Share Posted September 19, 2011 It was more the way it was said, with the sarcasm, that I personally wouldnt have said There was nothing sarcastic in what I typed. Are you maybe confusing sarcasm and irony? Nope, definitely not confused. Give me a brake will you Erm, sure... http://dl.dropbox.com/u/23967154/imagesCAKJ2489.jpgStrange request, but whatever floats your boat... Quote Link to comment Share on other sites More sharing options...
Bogof Posted September 19, 2011 Share Posted September 19, 2011 sorry for the late reply, I haven't looked on this thread for a while.TBH I cant tell from the picture, they just dont look like they are in bad shape i s'pose. I had a warped disk on the front, and it was so warped that it was rubbing when it went round, so the acceleration wasnt smooth, something i really only noticed when accelerating (speeding up) or braking. I didnt really notice it when sticking at the same speed (not sure why that is though) Thanks for the reply, but really you didn't need to, since I was apparently only being sarcastic. If it affected acceleration that wasn't warped, it was BENT! I suspect mine are warped on my Firestorm as the front brake pulses when applied hard. I'll carry on riding slowly for a while I think, new disks sound expensive Quote Link to comment Share on other sites More sharing options...
Jonabonospen Posted September 19, 2011 Share Posted September 19, 2011 http://dl.dropbox.com/u/23967154/imagesCAKJ2489.jpgStrange request, but whatever floats your boat... Hubba hubba Quote Link to comment Share on other sites More sharing options...
Tango Posted September 19, 2011 Share Posted September 19, 2011 I suspect mine are warped on my Firestorm as the front brake pulses when applied hard. I'll carry on riding slowly for a while I think, new disks sound expensive Cheap ABS...what more could you want.... Quote Link to comment Share on other sites More sharing options...
Colin the Bear Posted September 20, 2011 Share Posted September 20, 2011 I suspect mine are warped on my Firestorm as the front brake pulses when applied hard. I'll carry on riding slowly for a while I think, new disks sound expensive New discs are cheaper than six months in a body cast or a funeral. Quote Link to comment Share on other sites More sharing options...
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