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Thread: forks

  1. #21
    Tyre destroying, mad bastard menace
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    No diffrent but there is more than fork length at play
    Diffrent aspect of tyre's, stiffer springs with shorter action etc
    Diffrent rake if you change frame angle...
    There are a few good ways the lengthen forks if you need them
    or want std looking ride hight

  2. #22
    Aussie Streetfighter Hooligan
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    Stepped top yoke work well and are quite common.
    Thread in extensions are do-able as the bottom yoke does more of the work than the top,
    I have seen internal extensions done but not had much to do with them,
    I think Ben had a clip showing him doing them.

    I'm looking at a front end swap but it must be radial braked.
    Not worth the effort to end up with more shitty 6-pots off another Busa.

  3. #23
    Aussie Streetfighter Hooligan
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    Just ran a tape down a few here, Fork top to spindle.
    Very rough measure, some on stands, some not,
    but a common sort of average between USD and Non-USD

    Traditional / old style / non-USD..
    GSX1400........... 780mm
    Bandit 1200 ...... 770mm
    GSX1100ET ..... 770mm
    GSXR1100G .... 770mm

    My two USD front ends...
    Gen-1 Hayabusa... 695mm
    B-King................... 685mm

  4. #24
    Yeah that's what I'm getting at.
    A good swap is the '92 ish GSXR range as they're USD but long to suit the old school frame but as You've pointed out, the best you can do is a shitty (?) set of 6 pots!
    That was a bit of sarcasm as I thought 6 pots were pretty bloody good. Are radial mounted callipers that much better? ( not sarcasm, serious question)

  5. #25
    Aussie Streetfighter Hooligan
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    My Busa has a OK condition set of 6 pots and original master,
    braided lines, quality fluid and pads. All serviced and spot on.

    My B-King has 7 year old stock radial brakes,
    Original fluid, pads and factory rubber lines.

    B-King is in a different league!

    GSX1400 has similar 6 pots to my Busa,
    and in good condition they are best described as "average".

    King is two finger braking, even at speed, I love radials.
    Funny, I know Busa and GSX14 owners who bin the 6-plops
    to fit SV or similar 4 pots. Suzuki 6-Plops are over rated.

  6. #26
    I must be missing out as a mate has '01 6 pots on his Kat and they are phenomenal compared to my old Slabby GSXR
    Maybe time to work out an upgrade.

  7. #27
    Weekend Warrior
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    Quote Originally Posted by Boogieman View Post
    You're probabl past this point but aren't modern USD's a bit short to replace 80's forks?
    I'm used to Suzuki. Is kwaka different?
    Yeah, bit past, however I did measure the fully extended length and was only around 30mm difference from memory

  8. #28
    Bloke with the stick Gix11's Avatar
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    If you get stuck, there's these as Tony mentioned:

    http://www.store.extremecreations.co...ork-extensions

  9. #29
    Weekend Warrior
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    Yes, was checking them out the other day, awesome bit of gear and look relatively easy to install.

  10. #30
    Power Hungry, Law Disregarder
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    Ok, here's some data, not sure how accurate it all is but probably a good guide for starters. Copy and paste some where safe
    Make/Model year Range Fork Length mm (inch) (axle center to fork cap top extended suspension)
    Buell
    M1 700mm (27,5'')
    M2 730mm (28,75'')

    Ducati
    998s ohlins 720mm (28,374'')
    monster 750ie 02 730mm (28,74'')
    st3 04-05 725mm (28,54'')
    st4s 02-03 697mm (27,44'')

    Harley Davidson
    most 812mm (32'')

    Honda
    CBR1000RR 692mm (27,25'')
    CBR600F1 87-90 738mm (29,05'')
    CBR929 00-01 724mm (28,5'')
    CBR954 02-05 724mm (28,5'')
    RC51 SP1 762MM (30'')
    RC51 SP2 736MM (28,97'')
    vfr 750 fl 791mm (31,15'')
    VFR800 780mm (30,75'')
    vtr1000f 778mm (30,62'')

    kawasaki
    fz1 2007 762mm (30'')
    versys 774mm (30'')
    ZRX1100 766mm (30,15'')
    ZX10R 06-07 743mm (29,25'')
    ZX10R 04-05 730mm (28,75'')
    ZX14 742mm (29,25'')
    ZX636 750mm (29,5'')
    ZX9r B4 94-97 766mm (30,15'')

    Suzuki
    GSF 400 JDM 820mm (32'')
    GSXR1000 01-02 726mm (28,54'') was also quoted 715mm ?
    GSXR1000 03-04 720mm (28,34'')
    GSXR1000 05-06 720mm (28,34'')
    GSXR1000 07-08 720mm (28,34'')
    GSXR1100W 94 770mm mm (30,25)
    Gsxr1300 Hayabusa 99-07 725mm (28,54'')
    Gsxr1300 Hayabusa 08
    GSXR600 00-03
    GSXR600 04-05 720mm (28,34'')
    GSXR600 06-07 738mm (29,05'')
    GSXR750 88-89 43mm RWU 730mm
    GSXR750 90-95 750mm (29,5'') 257mm (10 1/8'')
    GSXR750 00-03
    GSXR750 04-05 720mm (28,34'')
    GSXR750 06-07 738mm (29,05'')
    GSXR750 SRAD 96-99 730mm (28,75'')
    RF600 97 750mm (29,5'') 257mm (10 1/8'')
    TL1000R all 717mm (28,22'')
    TL1000S all 732mm (28,81'')
    VZ800 Marauder 838mm (33'')

    Yamaha
    FZR400 790mm(31.1'')
    FZ750 1986 825mm (32,5'')
    FZR1000 87-88 770mm (30,3'')
    FZR1000 exup 89 770mm (30,25'')
    XV920 J virago 82-83 825mm (32,5'')


    As can be seen the kwaka USD hits the mark best with the ZX14 and 636 being the most favourable. They are both pretty cheap on the bay as well. dont seem as popular as other stuff for some reason. My choice would be the ZX14 forks. Longest of the usd's and once they stay parallel where you would want to clamp headlight mounts on. The 636 forks sort of waiste in between the tripples making it a bit more awkward to mount stuff. Both look good and are radial front ends too.

    Cheers Slingy

  11. #31
    Power Hungry, Law Disregarder
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    Ok, i new i had some more data some where. I think came from the TL Forum, so big thanks to them .

    Lots of very usefull numbers.


  12. #32
    Weekend Warrior
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    Cheers Slingy, good info, looks like I got a little bit of luck with the forks then, they are the 636 units!

  13. #33
    Power Hungry, Law Disregarder
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    Yep, you did good ;-)

  14. #34
    Aussie Streetfighter Hooligan
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    I'd consider a radial font end a MUST for a swap.
    Why bother doing it all for something as dated as an early Busa.

    The next level up the ladder (and what I'd like)
    are the current "Big Piston" forks.
    I'm hearing good things about the current ones...



  15. #35
    Weekend Warrior
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    G'day all, so another question, do you guys use the boots that go over the choke valves on the old carby donks or just don't bother, can get them from the States for 44 USD. but the friggen freight is the same price, they probably weigh about a gram each so pisses me right off to pay that sort of freight when they'll probably put them in an envelope that cost at the most 10 bux

  16. #36
    Power Hungry, Law Disregarder
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    Is this through Alphasport or Partshark or similar?
    Even if it isn't, look up the part on the above site's, as even if the original part is no longer available, it will nearly always list a current part substitute. Then go into your local dealer /shop and ask for a price on that part number. You might be surprised.
    I was trying to get some slingshot carb parts and told they were obsolete. Went on Alphasport and it went through 5 different links untill it settled on a current part substitute. Went back in to the same shop with that part number and got told," have em tomorrow " and when they turned up they looked identical to the original part. The point I am trying to make is part numbers change alot more frequently than the parts!

  17. #37
    Weekend Warrior
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    Cheers for that, I'll give it a go, and yeah all I did was type in the part #, will have to talk to the Mackay or Townsville suppliers.

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