Brock's Performance

Topics > Clutch Questions

Clutch Questions (58 FAQs)
Questions regarding our clutch mods, clutch cushion kits, clutch spring kits, and more.


Top 100 FAQs For This Topic
I have a 2005 Hayabusa with your clutch mod. For some reason the clutches don't last long. What could be the problem?
My Suzuki GSX-R1000 (Or Hayabusa) misses and stalls abruptly when I pull the clutch lever in – Do I need a Map? Is my Power Commander bad?
How much power does your clutch cushion kit hold up to for the GSXR1000s and Busas? I have been using a lock up and have had nothing but problems.
I installed your ultra clutch mod and yellow springs. Now, when I am on the line can I just dump it (does it drag or slip by itself and then bite) or do I still have to drag it? Is there more than one way of setting the clutch? I saw something about washers behind the springs? I am running 14-46 gearing and trying to keep the front end down through the end of first. I have a GSX-R1000 that's lowered and strapped with weights.
Clutch mod and HD springs: I have both in my Suzuki GSXR 1000 05". What I need help with is the clutch adjustment after both are installed. I see there are 3 adjustment areas; 1) the lever 2) the clutch release adjuster cap 3) and the clutch cable adjuster under the tank. How should all three be adjusted for the correct setting? Here is what I've noticed, when I leave free play at the lever it's hard to engage the gears but when it's tight at the lever it's no problem. I've followed your instructions to the tee and still it boggles me. I guess I don't know what I should expect with having your mods in there. Also where should the clutch start to grab? Very soon from the handle or in the middle? This has been racking my brain since I've owned the bike.
2002 Hayabusa 1397. I have your piston kit, intake cam, exhaust cam, sidewinder. Also PC III USB, 10 inch over swingarm, 60hp shot wet nitrous. It has no air filter(block-off plate) and used as a track bike only. 1. What type of fuel do you rec? 2. Do you have a map available? 3. Should I run baffle or not? 4. What be proper gearing, I weigh 200 lbs? 5. I have a MRE lock-up, should I run your spring package as a baseline? 6. How much can you safely spray until you have to take timing out?
What is clutch creep, what causes it?
If I use a lockup clutch, can I use a cushion kit? How do I know if I need new clutch components?
I have installed the Ultra Clutch Mod, and at first it seemed like the clutch was engaging at the half way point of clutch lever, but after a couple of hard launches it seems to be engaging more towards the almost full out. How do I set the clutch at the adjuster and know its right?
I have a 2007 gsxr 1000, Brock's clutch mod I have 2 clutch cushions, am I supposed to use them or just hyperplate? I have to let the clutch lever about half way out with no slipping and I would like to have it closer.
I have a 2006 GSX-R1000 and it has the 04 clutch (5 springs) with the stiff blue springs in it. Can I purchase the yellow 05/06 springs and put them in to make the clutch lever softer, because the blue ones are very stiff. Just want to know if it fits before I order them.
I've ordered and installed your clutch cushion mod for the 01-04 GSX-R1000. Would it defeat the purpose if I put the cushion in but left the stock springs in? With all 5 of the HD springs in the clutch lever it is very difficult to pull in, especially in traffic. Im not that big of a guy, at only 130lbs fully suited.
I run a GSX-R1000 K3 with one of your clutch cushion kits. My question is, can the cushion kit handle a 40 dry shot of nitrous?
I just bought a clutch cushion kit for my 93 Katana 1100. In the directions it shows using a lock up clutch. Do I need to run a lock up?
I just put an Ultra Clutch Mod in a 08 GSX-R1000. The lever releases too close to the bar. It rides like a dirt bike, two fingers on bar, two on lever. What can I do to make it release further out?
Is the Ultra Light Clutch Mod for the 2008 GSX-R1000 the same as the Clutch Cushion Mod?
I have a 2008 ZX-10R with nitrous oxide that makes 216 RWHP. Will removing the secondary butterflies give me a performance gain? Also, what can I do to the clutch setup to help achieve a better 60 foot time?
What should clutch stack height be with your clutch cushion kit installed in a Gen 1 Busa?
I am installing your Ultra Light Billet Clutch Mod for my Busa. I can remove the nut from the hub assembly with an impact gun, but I do not feel comfortable using it to install the nut. I would like to torque this to the manufacturer spec. Where can I find the tool illustrated (the Clutch Hub Holder) that is shown on your instruction paper?
What is an Ultra Clutch Mod?
I purchased your cushion kit for my mk1 bandit,with gsxr clutch fitted. In my current configuration I have my lock up set to throw the lever. Should I just stay with the same static pressure (ie not use springs supplied)?
What is a Clutch Cushion Kit?
What clutch spring setup would be good for my high horsepower Hayabusa and how much can it handle?
I recently purchased a ZX-14R clutch mod but could not get the nut off despite trying with rag, glove, trying to wedge something to keep it from spinning, applying heat, etc. I was using impact wrench and 27mm going in reverse (left). It did not want to
I have one of your clutch cushions and have already downloaded your excellent instructions for it. I see that it can also be used with the MTC inner and multistage. Would the instructions for the clutch frictions and steels be the same? I`ve been trying to set up my multistage without your cushion and now I am frustrated. Any advice you can offer would be much appreciated.
Brock's, Please advise, I own an 2005 Busa 1394cc with a MTC Multi-stage Lock-Up, a MTC billet clutch basket and MTC inner hub. I want to stop using my lock-up and switch to your Clutch Cushion Kit instead; however, I want to keep using my MTC basket and inner hub. (Note that I have already purchased your clutch cushion kit #270500 and clutch spring spacer kit .280 thick #270435.) My question is, do I use your Clutch Cushion Kit HD and XHD springs and your Clutch Spring Spacer Kit .280 Thick together with my MTC hub and basket? I ask because I read Dragbike's March 21, 2003 "BDE Hayabusa Clutch Cushion System" article which mentions to use your "S13-CCK-MTC" with MTC lock-up unit. I am guessing that the nomenclature, "S13-CCK-MTC" is now your Clutch Spring Spacer Kit #270435; is this correct? Additionally, I read in the overview section of your Clutch Spring Spacer Kit .280 Thick, that it too mentions using with a MTC Inner Hub. Thanks much for any advise provided.
I have an '05 busa with your mod and cushion. I need to know the proper stack height.
Should I weld the clutch basket on my 2008 ZX-10R? Primary use is street with track use 3 – 4 times per month.
What if the lever cam which came with my clutch cushion kit does not work with my aftermarket levers?
I have a 2007 zx14. The clutch chatters horrible when I launch it at the track. I see you make a kit for the 2012, any suggestions for my 07?
ZX-14 Clutch Chatter
2001 turbo Hayabusa, about 300 hp to the rear wheel. What do you recommend for the clutch set up? I do not want to use a lock up. I currently have a set of Brock’s stiffer clutch springs springs.
If I use the 99-07 clutch cushion do I also have to use the 99-07 fibers along with the spring studs or can I use the 08 fibers along with the 99-07 spring studs?
I have a 2005 Busa with 1394 motor and a MTC Multi-stage lock up clutch with MTC Light Springs (static) (180 lbs pressure I believe). In your FAQs section you mentioned that you have used your Cushion Kit with a Lock-up Clutch. Did you have to use heavier static springs when using the Cushion Kit with the Lock-up Kit vs when not using the Cushion Kit?
Heavy duty springs with spacers and lock up
I have mounted the clutch cushion kit on my Busa. Now I’m mounting a lock up clutch. Do I have to do anything with the spring pressure or will the springs that followed the cushion kit work well?
My ZX-14 clutch is bad. Should I go with the OEM clutch and/or should I install a lock up?
Does the Clutch Cushion Kit or the Ultra Mod come with a gasket for the clutch cover?
Can I use the "08 or "09 Busa clutch plates and fibers (the proper numbers) setup on my "05 busa (in the brock clutch- Mod sequence)?
Will a Gen1 clutch cushion kit work in a Gen2 Busa?
Put clutch mod in o7 gsxr 1000 but bik had slowed down. I wont sixty foot now before mod it was 1.41 now its 1.60 what is stock stack height
I have a 2009 ZX-14 and I recently installed a 40 shot nitrous kit for track use. I'm looking for advice on strengthening the clutch. How much stiffer is the clutch with each of your spacers? What set up would you recommend for my use?
Clutch springs and spacers
Hi there, I'm looking to upgrade the clutch on my 06 busa. Its ridden on weekends and is at the track about once a month. Can you make a suggestion as to what parts I should be upgrading? Would you be able to send me a link to the piece(s) you suggest? I'm hoping to cut a few tenths off at the track, and have a clutch that can handle some extra power down the road. Thanks
I have a 2012 Zx-10r and have heard of people going through clutches after a few passes at the drag strip. I understand a good prevention measure for this is your clutch mod, heavier springs and / or your cushion kit. I occasionally go to the strip for test and tunes but my bike is mainly for street riding. What extra benefits do you get from the cushion kit over just the clutch mod and upgraded springs? How does it affect daily street riding?
I have a 2000 Busa and I'm using stock steels and fibers. On your directions you don’t show the thick steel plates in your drawing. Do I use them or not? You also show two steel plates with round side facing away from engine in drawing and the directions only say the first steel plate round side is facing away from engine. What way should it be done?
Do you sell or know where I can get heavier clutch springs?
I put Petron Oil Additive into my 2008 cbr1000rr and now my clutch is slipping. Why is this happening and what can I do to fix it.
Does the clutch cushion kit make it harder to go into neutral? I do have aftermarket levers, so I'm not sure if that has an effect either.
i have one more question i replaced my hayabusa clutch line, i have the cushion kit. on #6 on lever, lever still goes 1/2 way out before engaging. used to be close to the bar. i have a new clutch pack too. should i squeeze clutch and open bleeder to adjust it?
2012 zx10 with full brock clutch mod, sidewinder, total wt is 595 at 70" I'm 175 suited with 190 hp. What color springs should I be using
Spring kit to use with clutch mod
I checked the spring pressure on one of my clutch springs and it appears to be outside of spec according to your instructions. Should I be concerned and/or is there anything I can do?
How do you measure the strength of the clutch springs?
I purchased a set of your heavy duty clutch springs p#270292. Since there are only 5 springs is it possible to only use say 2 or 3 heavy ones with the others remaining stock. Will this jeopardize the feel or operation of the clutch?Thanks Don Black
What clutch spring setup would be good for my high horsepower ZX-14 and how much can it handle?
Purchased a dual clutch cushion and cushion ring from buddy...i do not have the heavy duty springs from kit but have brocks mod wondering since i do not have heavy duty springs can i still use spacers from clutch mod
What would cause my clutch to "Creep" - or move/drag my bike forward... even when I have the clutch pulled in?
Will a catastrophic clutch failure damage my Brock's Performance clutch springs?
Hi I purchased your Clutch spring spacer kit for 2004-2007 zx10r and they do not seat into the "retainer" or "bucket" on top of the springs, way undersized. I tried a 2004 and 2005 clutch. Could it be packaged wrong, or what am I doing wrong here cause it doesn't make sense.
I have your clutch mod and clutch cushion. When I first installed everything, my clutch worked great! But now, my 60ft's are off. Is it me... or could something change?
My H2 makes a squeak noise sometimes. Some mechanics recommended that i do not use the kawasaki 10w-40 synthetic oil, because it shortens the clutch life. Is this squeak normal? And could it be from the oil or heavy duty springs I installed?
Ninja H2 squeaking noise

Recently Added FAQs To This Topic
Hi I purchased your Clutch spring spacer kit for 2004-2007 zx10r and they do not seat into the "retainer" or "bucket" on top of the springs, way undersized. I tried a 2004 and 2005 clutch. Could it be packaged wrong, or what am I doing wrong here cause it doesn't make sense.
My H2 makes a squeak noise sometimes. Some mechanics recommended that i do not use the kawasaki 10w-40 synthetic oil, because it shortens the clutch life. Is this squeak normal? And could it be from the oil or heavy duty springs I installed?
Ninja H2 squeaking noise
Will a catastrophic clutch failure damage my Brock's Performance clutch springs?
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