Spirit Posted July 30, 2018 Posted July 30, 2018 Are there any bolt-on or nearly bolt-on 4 (or six?) piston calipers that will fit an '85 Suzuki GS1150 using the standard fork legs AND discs? Quote
arnout Posted July 31, 2018 Posted July 31, 2018 Sorry, no suggestion for any direct caliper replacements. The feel and force of the stock EFE/GS1150 front brakes was terrible from new. From the rock hard lever and poor deceleration performance I deduct a mismatch between the master cylinder and the calipers on these bikes. It would be interesting to find out if fitting a smaller bore m/c could actually correct this and produce accepable braking performance using the stock calipers and discs. Quote
Spirit Posted July 31, 2018 Author Posted July 31, 2018 A smaller bore master cyl.? I would've guessed a larger bore one. Why smaller? Quote
Dezza Posted July 31, 2018 Posted July 31, 2018 Smaller gives better power but increased lever travel. Bigger bore gives a firmer feel but reduced power. To get the best of both world's, this is why the radial front master cylinder was invented. If you want to keep the stock EFE forks, wheel and discs maybe try what arnout suggests and also different pads. Changing pads often has almost miraculous effects on braking performance. Quote
Gixer1460 Posted July 31, 2018 Posted July 31, 2018 Quote this is why the radial front master cylinder was invented. Won't make any difference - it's a cylinder with a set bore size but adjustable lever ratio. The bore dictates the pressure and the lever ratio dictates the feel! Crap brakes won't get any better with a fancy master but they may if the master (however it is operated) is correctly sized! 1 Quote
gsx1100e Posted July 31, 2018 Posted July 31, 2018 Do you have old brake lines, if they are old part of pressure just expands rubberlines instead of moves pistons. Quote
Spirit Posted August 2, 2018 Author Posted August 2, 2018 GSX1100E, no, I have braided steel lines, recently trued discs, fresh linings...and I still don't like the braking. I know it can't be my TL1000R or refitted GSXR with 6 piston calipers, but I need better stopping. That's why I'm considering getting a bracket made to adapt Brembo (at least) 4 piston calipers. Quote
inazumarob Posted August 2, 2018 Posted August 2, 2018 You can fit GSX 600F wheel and discs with 4 or 6 pot calipers on STD legs. I would use a 17mm master. I have upgraded a 88 Slabby on STD brakes with a master cylinder off a Yam XJR and got much better brakes. Quote
Mak595 Posted August 3, 2018 Posted August 3, 2018 On 8/2/2018 at 11:43 AM, inazumarob said: You can fit GSX 600F wheel and discs with 4 or 6 pot calipers on STD legs. I would use a 17mm master. I have upgraded a 88 Slabby on STD brakes with a master cylinder off a Yam XJR and got much better brakes. Same trick in Vmax using the XJR M/C Quote
Spirit Posted August 6, 2018 Author Posted August 6, 2018 Inazumrob, do you mean that the GSX600F wheel/discs fit on an 1150 or do you mean switch the legs from a GSX600F onto the 1150 tubes. or....? Quote
Captain Chaos Posted August 7, 2018 Posted August 7, 2018 http://oldskoolsuzuki.info/archives/category/modifications/wheel-swaps Quote
inazumarob Posted October 29, 2018 Posted October 29, 2018 I have used a GS500 wheel in std legs. Spindle spacers need remaking, and calipers need spacers on bolts to bring inline with GSX6000F discs. Use EFE Spindle. Quote
Jonboy Posted October 31, 2018 Posted October 31, 2018 (edited) I was sure there was an upgrade to 4 pots. Seem to remeber it being on the the Old GS4 web forum a long time back. Will see if i can find......... Seems the Captains link may have encompassed that modification, maybe the anwer is to fit a wheel discs and calipers as shown . Edited October 31, 2018 by Jonboy Doh!! Quote
Spirit Posted December 25, 2018 Author Posted December 25, 2018 As it turns out, I have a local dealer who has a set of Brembo calipers from a Guzzi Norge that we're going to fit. Need to make a bracket, that's all (we hope). Quote
Rustynail Posted December 25, 2018 Posted December 25, 2018 Here's an idea for your brackets Because we like pictures 1 Quote
Rustynail Posted December 25, 2018 Posted December 25, 2018 3 hours ago, Gixer1460 said: Nice bit of mill work there Can't take the credit for it though, from some talented chaps in Japan. Quote
Spirit Posted January 15, 2019 Author Posted January 15, 2019 Yeah, I was going to use them...but I found a local guy who does really good bracketry AND a dealer with takeoff 4 piston Brembos..... Quote
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