| Author | Message | ||
     Dirty_john |
Since I am having repeated issues with rear caliper seizures I am looking to fit an alternative caliper to the back end, has anyone done this before? | ||
| Avalaugh |
I think so DJ, seem yo recall a picture of one in my head, was on a bracket and it could be seen below the swingarm. If I find it I'll let ya know. | ||
| Zac4mac |
Al has a Brembo two-pot rear with an adapter bracket at American Sport Bike for XBs, don't see anything for the 1125 tho. | ||
| Dktechguy112 |
Have you tried to put turnouts on the exhaust tips, the stock exhaust sends all the soot to the rear wheel/rearbrake, I put some exhaust turnouts on mine and it has really kept the soot of the rear brake and wheel. | ||
| 1_mike |
Don't know if this counts...but, I put a TZ250 caliper on my old FZR1000 hot rod, back in the day. Modified the rotor, made a bracket, specified and had a hyd. line made. Not a big deal if you put your mind to it. Mike | ||
| Dano_12s |
John, not sure what your issue is w/brake but take a close look at the mastercylinder to make sure the cylinder is returning completely,there may be corrosion behind the rubber seal. | ||
| Dirty_john |
Zak4mac - yep I have seen the Trojan ad for the XB Brembo conversion and I may rework one of those. Dktechguy112 - cheers but I haven't used the standard exhaust since 200 miles from owning the bike from new in nov 08, the sight of all that exhaust condensing on the wheel and brake was the reason to dump the standard can immediately. Dan0_12s - thanks I will check the master cylinder, but I think the issue is pistons picking up in the caliper. | ||
| Dirty_john |
Avalaugh - thanks, let me know if you come up with anything, I suppose it shoudl be easy to adapt any rear brake caliper with a simple bracket bolted to the original caliper mounts, it was a daft idea to mount the caliper behind the swinging arm as opposed to that used on my Firebolt. | ||
| Froggy |
Erik Buell Racing has 2 piston rear brakes available, shoot them an email. Personally, I wonder if the issue isn't the brake but something else wrong on the bike. Are you sure you aren't accidentally resting your foot on the lever? | ||
| Rogue_biker |
My '08 rear caliper tightened up to the rotor so it warped the rear rotor. Dealer replaced rotor and caliper under warranty. | ||
| Dirty_john |
Froggy, thanks but that is not the issue, my toes are usually outside the line of the foot pedal (comes from riding UJM in the 1970s and 80s) all alignments are correct etc. Its a seizing inner piston. As noted by Rogue_biker I have no intention of letting this develop into rotor lock on or failure and I intend to look at mounting a Brembo caliper in a more accessible location. I hardly use the rear brake anyway. | ||
| Dano_12s |
John, just asking if you tried loosening the banjo bolt on caliper to see if that helps pushing piston back.I had to replace my MC.Good luck. | ||
| Jdugger |
I had a rear MC seize on my '09 as well. I'd have not bothered to even replace it if it were not warranty. I didn't even realize it, but the dealer did, and when the bike was in for a clutch seal fix replaced the MC as well. | ||
| Dirty_john |
Jdugger - I know what you mean but I don't want to run the risk of the rear brake locking on. I intend to examine both the master cylinder and caliper this weekend, replacing the rear master cylinder with a Brembo unit and also have a look at various Brembo rear brake calipers, pretty sure its the inside piston in the caliper picking up as this has been a problem before, bike is out of warranty by a couple of months and I can't be bothered in dealing with HD-UK who are notorious over here for their lack of customer service, rather fix the issue myself and have the satisfaction of doing so, with the caliper mounted where it is less likely to get covered in crap from the roads we have over here. | ||
| Jdugger |
Dirty, Just spread the rear pads apart and don't touch the lever. Problem solved. | ||
| Rogue_biker |
I like using my rear brakes. The bike stops faster and it balances the braking forces between F&R and keeps the bike more level. Of course, 80%-90% of my braking is done by the front but still... | ||
| Dirty_john |
Jdugger - I use the rear brake at walking pace but really use the front brake heavily at speed with just a touch of rear brake. A functioning rear caliper that I can trust is a must. Talking to my excellent local dealer there doesn't seem to be an option to buy a rear caliper overhaul kit or even the individual pistons and seals (this is ridiculous if true - I can buy caliper overhaul kits for my brother's Triumph and my Suzuki track bike) I will have to check my parts manual tonight Safe riding lads | ||
| Jdugger |
John, Yea, you just replace the rear caliper. It's not serviceable that I know of. | ||
| Sportster_mann |
Anybody tried the Alth rear floating rotor to see if it improves rear brake feel and caliper life ? http://www.alth.it/catalogo.asp?content=2,0,0,0,0, 0,00.html&vedicodice=1&codice=FL31600&marca=2809&c c=ALL&anno=2008 | ||
| Jdugger |
> caliper life My rear caliper had to be replaced because the way the pads hang on the piston with the little wire thing eventually wore through. So, the pads would dangle there loose. I never so much as touch the rear brake. I just keep the caliper there to pass tech. | ||
| Dirty_john |
I have just ordered a Brembo goldline rear caliper c/w pads for less than the replacement OEM caliper c/w pads and will make up an adaptor plate to hold the caliper just above the swinging arm when I get home in a couple of weeks time, I also intend to fit a Brembo rear master cylinder. At least I can buy caliper overhaul kits for the Brembo rear caliper and have ordered two of these kits for my parts stock. When I have made the bracket I will produce a simple drg and anyone that would like a copy can pm me, give me a few weeks to sort it out as I am working away from home at the moment Cheers to all Rgds John (Message edited by Dirty_john on February 12, 2011) | ||
| Fast1075 |
I like this thread...no whining about how much the dealer will "gouge" you to fix it or about bad design, or politics about where the parts came from, or whatever. Just about rolling up your sleeves and getting it not only done, but improved. And offering to share the info. Good job. | ||
| Sportster_mann |
Have to admit that I'm a little surprised the the rear caliper is just bolted up with no "float" built in - wouldn't it be better if it was attached on pins so that there was a little movement available - that would then cater for any manufacturing inaccuracies ? I replaced my rear pads recently and the inner pad was more worn than the outer one - a little float would have cured this surely ? (Message edited by sportster_mann on February 12, 2011) | ||
| Jdugger |
Sportster, Maybe, maybe not. Float mostly helps for heat related movement in the rotor and parts. I personally don't think it's necessary in the rear brake, which isn't that useful on a bike like this, anyway. Uneven wear isn't necessarily because of or will be prevented with float. There are two pistons in that caliper, and if uneven pressure comes from them, you will get uneven wear. If you look at the caliper design closely, you will realize there's movement just as if the pads were on a pin-hanger design. | ||
| Dirty_john |
Quite a lot of bikes have fixed double piston rear calipers and no floating discs (my Suzuki GS750 was like this when I bought it in 1978 and my Ducati in 1982) there should not be a need for a floating disc if the relationship between disc and caliper cannot vary, which in theory it shouldn't. Uneven pad wear could be due to a piston not fully returning to the rest position provided the disc is centred correctly. After the caliper mod will come a floating disc to go with the Brembo caliper and rear master cylinder just for completeness, I already have a Brembo RCS radial front master cylinder to fit when I can find the time, its a pain working in London all week (and some weekends)when my permanent home is in the Northwest of the UK. Fast1075 - I have whinged about poor wheel bearing life on this forum and others, can't be bothered to whinge about the rear brake just fix it and carry on (Message edited by Dirty_john on February 12, 2011) (Message edited by Dirty_john on February 12, 2011) | ||
| Dirty_john |
Compare the 2011 Suzuki GSXR 600 to my 2000 model year GSXR SRAD track bike - low and behold the rear brake cailper has moved from under the swinging arm on the 2000 model to above it on the new model, just like my old 1978 GS750.Just goes to show that the plague of siezed Suzuki rear calipers has made them rethink their design. Now compare the XB series rear caliper position with that of the 1125R/CR | ||
| Zac4mac |
The last time I replaced my rear pads, both sides were worn perfectly even, about 1mm thick all around, both pads. That's a GREAT brake IMO. Works fine too, as long as you bed the pads and keep them clean. | ||
| Dirty_john |
Zac4mac - glad your rear brake is functional, as my bike is washed quite often and without the use of the a pressure washer, given that I clean the calipers quite frequently, do not ride the bike salted roads I find the problems I have experienced with the rear brake system disappointing to say the least. Having ridden, maintained and rebuilt bikes for over 36 yrs I think I know what I am doing. | ||
| Zac4mac |
John - not knocking your knowledge at all, just my experiences with this brake setup. I've replaced my rear pads twice now in 26k miles, first time had a little more pad left than the last. Works fine for gentle commute riding, less functional the more "spirited" things get. I use the rears more when commuting, much less when in the mountains. I push the bike harder when in the twisties, don't see the need for more speed/faster stopping when commuting. It really doesn't matter if I get home 30 seconds faster than the last time I rode home from work.... | ||
| Dirty_john |
Well guess what, no adaptor plate needed, at least for the moment - I fitted the Brembo rear caliper today and the caliper mounting holes were the same dimension as the Nissan caliper - so now with the Brembo I have got a solution which is slightly lighter than the Nissin, costs less and is rebuildable, all I needed to do was add a 2mm washer between the new caliper and the mounting bosses to get the caliper aligned with the disc centreline. The standard hydraulic hose is usable but not 100% perfect, but at least the bike is rideable again. I ask myself how could I buy a Brembo goldline caliper which is far superior product that comes with pads etc (as does the Nissin) for less cash than the OEM part? For those in the UK the caliper was bought from Biketorque racing (www.biketorqueracing.co.uk)and the part number was 20516143 not sure if this is a Biketorque part number or an actual Brembo part number but the caliper is from a modern Ducati apparently (Message edited by Dirty_john on February 19, 2011) |
