R100GS Nissin 4-piston caliper conversion

Discussion in 'Airheads' started by Solo Lobo, Apr 7, 2005.

  1. Geek

    Geek oot & aboot

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    My GSXR1000 brakes are the exact same as the 6 piston Haybusa's Tokico's. They were NOT as good as as my CBR race bike's 4 piston brakes were. My R1's brakes fell somewhere in between.

    "More brake pad" doesn't mean squat if you don't have the proper hydraulic pressure and feel. If you go bigger on your brake pad without increasing your hydraulic leverage you have LESS braking power due to your psi being distributed over a larger surface area.

    What are you guys doing for mastercylinder replacement to match the calipers?

    I'm not trying to disagree with anyone here; I need a solution for my R90 and definitely look forward to your experience(s). I'm just mentioning that "bigger isn't always better" when it comes to brakes - which I found out the hard way spending a lot of money on galfer wave rotors, ceramic pads, different diameter lines, etc for a 6 piston system that never came up to par on the stock (+ steel lines) 4 system system on my other bike(s).

    p.s. another thing I learned was that I warped my rotors faster with the 6 pistons than the 4 pistons. Dunno why but I'd guess it to do with a larger heat gain with all that contact area?

    ...that said.. my gixxer's brakes sure were pretty....

    Here.. see if you can find the brakes in this photo of it :lol3

    [​IMG]
    #81
  2. lesman

    lesman Live easy, Brake Hard

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    Stock 2 piston Brembo = My wife's next husband gets my tools because I'm dead.
    4 Piston Brembo = I can lead a normal life and perhaps enjoy a little adventure
    6 Piston Tokico= I can press my luck ,possible ruin my retirement plans, enjoy adventure and my wife's next husband get my tools because I'm dead.
    The choice is pretty clear.
    I have enough parts to go to a dual caliper setup....don't make me do it.
    Stop the madness
    I didn't change my Master Cylinder. I bought a new one. I was leaving for a 3 or 4 day trip and mine started to leak bad. I was running DOT5 and switched back to DOT4. I like DOT 5 but there is a big difference in the feel of the brake lever and stopping. I think there is a 5-10 % increase in braking.A new MC arrived a few days faster than a kit. I haven't looked at MC /caliper ratio chart to see if I could spend anymore money on my brake tragedy. Has any one gone the 320mm rotor route? Can someone explain what could be expected in better braking? The brake upgrade was just hoot to do with all it's permutations. I enjoy doing the upgrades to my GS. Your GSXR came with incredible brakes, 300 to 400 % more hp, fuel injection and a real charging system...incremental increases are costly and underwhelming. My bike stops on a dime with 3 cents change, has great lights and handles like a finely tuned Greyhound bus...I am a happy crack whore.
    If the R90 has dual calipers go the 4 piston Brembo route if you are trying to maintain a stock appearance. You will be pleased. I powdercoated my brembo (don't forget the clearcoat on the raised brembo letters) and it's just beautiful The Japanese caliper is just an excellent alternative. I want to point out that I weigh 230+ with gear.
    Stock MC's can be bored out , SS sleave installed and I think bigger piston installed.It allows you to use stock switch gear. I think it's pricey $350+


    When my bike stops good enough to warp the rotor...I'll wear a thong.

    By the way her thumb is on the brakes..right?





    Les
    #82
  3. datchew

    datchew Don't buy from Brad

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    I think Mugwest has some literary competition now.

    That's a quotable quote if ever I saw one.




    By the way, will you guys shut up already about the 4-piston being the "just right" setup? I'm trying to get Solo Lobo to slap that 6-piston on there and send me his 4-piston :deal and you guys are gonna screw it all up.
    #83
  4. Solo Lobo

    Solo Lobo airhead or nothing

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    Man, I love this thread!!!..... :evil

    My wife just doesn't understand this adventure rider thing, her loss I guess:rofl


    Oh, and I have a nice, new, black 46" ss line coming along with the SIX PISTON caliper!:clap
    #84
  5. lesman

    lesman Live easy, Brake Hard

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    Thanks for using my quote. Please add the "a" to stops on a dime part of the quote. This happy crack whore needs an editor. Here's a quote I stole. A guy in the Houston Euroriders drives up on a 1999 1100R. It's just beautiful. I tell him I thought the Mystic was most beautiful naked bike until I saw his bike. He says"I love my naked bikes with big jugs" This is the reason I love my GS...it's got big jugs and 6 piston brakes.

    Solo: Where and How much did you pay for your line? I use Spiegler. Custom length, angle of the banjo or not etc. $59.00. They are very nice and aren't judgemental.


    Les
    #85
  6. Solo Lobo

    Solo Lobo airhead or nothing

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    hahahahahahaahahahahahahaah..... LOVE your avitar! hahahahahahahah

    My line is an ebay special... $15.99:evil
    #86
  7. lesman

    lesman Live easy, Brake Hard

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    #87
  8. lesman

    lesman Live easy, Brake Hard

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    #88
  9. Wirespokes

    Wirespokes Beemerholics Anonymous

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    Les - go back to the post where you wrote that and hit the edit button at the bottom. That will allow you to change the posting.
    #89
  10. lesman

    lesman Live easy, Brake Hard

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    It be done.




    Les
    #90
  11. Solo Lobo

    Solo Lobo airhead or nothing

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    It has arrived... and low and behold, the Hayabusa 6 piston Nissin caliper looks to have the exact same mounting arrangement as my current four-piston Nissin, so my adapter should work...

    More later after I get the front end of my bike back together and I can mount this one up :evil
    #91
  12. datchew

    datchew Don't buy from Brad

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    :lurk
    #92
  13. Wirespokes

    Wirespokes Beemerholics Anonymous

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    Mine showed up but haven't held it up against the GS fork leg yet. I did check to see if the other side would work on the 80G/S and sadly, it doesn't look like it. :cry Guess I could modify a spare slider so I could have dual six-piston-calipers. That ougta haul me down from triple digits with several left over. :lol3
    #93
  14. Solo Lobo

    Solo Lobo airhead or nothing

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    So, I happen to have a Nissin 4 piston and a Tokico 6-Piston... I would bet dollars to doughnuts that they are identical, and will try to remember to take a few measurements this weekend.

    What this means is that almost any japanese bike wearing non-raidal 6-piston calipers would be a suitable donor for this conversion using the adapter that the pdf describes...
    #94
  15. datchew

    datchew Don't buy from Brad

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    That is a seriously significant finding. +50 adv points.
    #95
  16. datchew

    datchew Don't buy from Brad

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    and I guess this means you haven't put it on the bike yet, huh?
    #96
  17. Solo Lobo

    Solo Lobo airhead or nothing

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    duh.... haven't you tuned into my steeringhead bearings thread? still waiting for a part to put it all back together!
    #97
  18. datchew

    datchew Don't buy from Brad

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    you mean I'm supposed to actually read up on things before I throw out a stupid question?


    jeez... this place is getting as tough as a real job!
    #98
  19. Wirespokes

    Wirespokes Beemerholics Anonymous

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    I'm curious about making a mount for a radial caliper. Anyone done that?
    #99
  20. Stagehand

    Stagehand Imperfectionist

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    Please allow me a dumb question: wats radial caliper? compared to a non-radial one i mean-

    thanks-
    J