phatstorage Posted April 9, 2015 Share Posted April 9, 2015 I'm getting uneven braking, as in one side is doing nothing. As far as the judder goes, I noticed that it only seems to happen when the brakes have been used a bit, mostly in traffic, today I thought I'd check to see what temperature the brake disks were after a ride from town, the right side was stone cold and the other nearly burnt my hand. As to the judder, I'm guessing that would be from the slight warping of the over worked left disc but I'm not sure what the cause of the dead right brake is. There doesn't appear to be any binding on the left as the wheel spins freely, so the heat is purely from braking. No leaks at the right side caliper either, pipes seem straight. I've sent an email to my dealer so I can get it to them sooner rather than later but for now, I have to use it for work. It's been like this for over a month now and I only just thought to check the disc temps. For that, I'll accept I may need to cough for a new disc and pads for the left before time. I've not had many twin disc bikes so I'm not familiar with this problem. Any ideas? Cheers. Link to comment Share on other sites More sharing options...
cjb1019 Posted April 9, 2015 Share Posted April 9, 2015 First thing I would suggest is to check your brake pistons, especially if you've been riding through winter, as both me and another UK all-weather rider have had chipping/pitting in the pistons (detailed here). It might be that there's pitting preventing the pistons from moving properly? Link to comment Share on other sites More sharing options...
Member Contributer Cogswell Posted April 10, 2015 Member Contributer Share Posted April 10, 2015 Possibly air in one caliper? Link to comment Share on other sites More sharing options...
phatstorage Posted April 10, 2015 Author Share Posted April 10, 2015 Fair enough, was used every day throughout winter, will look at that. Thanks for the replies. Link to comment Share on other sites More sharing options...
phatstorage Posted April 10, 2015 Author Share Posted April 10, 2015 Just read the linked post, looks like I may have a challenge on my hands with my dealer. See how it goes. Link to comment Share on other sites More sharing options...
timm Posted April 10, 2015 Share Posted April 10, 2015 If you have a completely non-usable caliper due to a broken piston and you've used the bike normally during one year, I think Honda have a problem. IMHO it acctually sounds a bit unlikely. I would take the caliper off on the non-working side and squeeze the brake lever gently, to see if the pistons move. (Careful! Not too much. You don't want them to pop out.) Give the whole thing an inspection, clean the pistons and maybe put some silicone grease on them before pushing them back. If they move as they should and look ok it is possible that you have got oil or grease on the brake disc for some reason. That would explain the low friction (no heat when breaking) as well as the judder. If so, throw away all brake pads (ie. both sides), Clean both discs thoroughly with alcohol and put new pads in. Link to comment Share on other sites More sharing options...
vtwindr Posted April 10, 2015 Share Posted April 10, 2015 In the end the dealer sorted mine although was a bit grumpy. Interestingly I spitted the damage as one day the brake felt like it was binding briefly and had the hot/cold thing (though no warping). I took the calipers off to clean them. One pad was stuck in the caliper (the cold side) and not moving. The pistons were knbackered all round Link to comment Share on other sites More sharing options...
phatstorage Posted April 10, 2015 Author Share Posted April 10, 2015 Unfortunately I don't have anywhere suitable to work on the bike to that level, I also am constantly tight for time, today for instance I'm doing 0500 to 2345 in the city. I have however booked the bike in for next Saturday. See what they make of it. Thanks for the help, I'll report back in a couple of weeks. Link to comment Share on other sites More sharing options...
phatstorage Posted April 18, 2015 Author Share Posted April 18, 2015 Bike's gone in, front brake pistons are pitted, they'll be replaced under warranty. Good old 1st line :) Link to comment Share on other sites More sharing options...
Allyance Posted April 18, 2015 Share Posted April 18, 2015 Why are all these pitting problems showing up in the UK? The UK bikes must have had an earlier batch of bad calipers. Checked mine after 5K miles when I changed tire, no problems. Link to comment Share on other sites More sharing options...
vtwindr Posted April 18, 2015 Share Posted April 18, 2015 blimey, 3 of us now. Not great, wonder if they will do a recall? Link to comment Share on other sites More sharing options...
timm Posted April 18, 2015 Share Posted April 18, 2015 That was a little unexpected, really. I read a few bike forums, but have never read or heard about bad brake pistons before. (Except here...) Link to comment Share on other sites More sharing options...
phatstorage Posted April 25, 2015 Author Share Posted April 25, 2015 Going into a second week as honda wanted pictures and other documents from my dealer, they are dragging their heels on this but will bow down. I've got an nc700 to keep me going, I used to have one of these. Forgotten how slow and unstable they are, also having no fairing is grim, bug splats on my chest and cold hands are the order of the day. Still, it's better than a 125 scooter so could be worse. Link to comment Share on other sites More sharing options...
vtwindr Posted April 25, 2015 Share Posted April 25, 2015 I've sent a letter to MCN about mine as they has a VFR long term test bike. Will have to see if they pick it up Link to comment Share on other sites More sharing options...
phatstorage Posted April 25, 2015 Author Share Posted April 25, 2015 I've sent a letter to MCN about mine as they has a VFR long term test bike. Will have to see if they pick it up Nice, I'm wondering if it would ever get to recall levels like the dodgy chains and self resetting trip counters that plagued the nc700-750 series recently. I'm sort of thinking not, as not many people have this bike over the vast amounts of NCs shifted over the past few years, so less complaints and returns, it may not even make it onto Honda's radar. Still, as long as honda honour the warranty on a case by case basis, that's good enough for me. Link to comment Share on other sites More sharing options...
phatstorage Posted May 2, 2015 Author Share Posted May 2, 2015 Got the bike back on Thursday, Right fingers actually stop the bike properly now, they replaced the discs as they were slightly pitted in places and they decided in for a penny and all that, the pads are new as are the pistons and seals. It's so nice to ride after using an NC700. Link to comment Share on other sites More sharing options...
Carlosfandango Posted May 16, 2015 Share Posted May 16, 2015 I think some preventative action required here, over the summer I will strip mine down, clean and use some brake grease ( the red stuff NOT copper grease as this will ruin things). We have a particular problem in the UK with loads of salt used in winter on the roads, sounds like Honda (Tokico?) are using cheap parts, we ought to keep an eye on this. If many of us get the same problem we ought report to the authorities to get a recall. Link to comment Share on other sites More sharing options...
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