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GSXR Fork Information / Permutations

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528K views 1.1K replies 197 participants last post by  Bremsen  
#1 · (Edited by Moderator)
Here is a summary of the different models of USD Radial forks used on the various Suzuki models.
Hopefully, this will concentrate all the dimensional information on the most popular SV/GSXR fork conversion possible configurations.

Let's start with the matrices for the dimensions of the various fork models:

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Acknowledgments to Sam over at TL zone for initiating the primary chart creation and to all those who provided the data for it.

This excellent illustration courtesy of jeff721 will help indicate to what the measurements in the chart refer:

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Of course, there are the non-radial USDs used on the 01-03 750 and 01-02 1000 but the Radial versions seem to be the most popular, so that is the focus of this post.

So - looking at the primary area of interest for GSXR Radial Forks:

2003/04 1000
Gold/black inner tubes; gold calipers
300mm rotors.
850 springs
32mm offset; 54mm lower clamp
Right offset ignition top clamp, 28mm bore

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2005/06 1000
Bronze/black inners; black calipers
310mm rotors
950 springs
30mm offset, 54mm lower clamp
Center ignition top clamp, 28mm bore

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2004/05 600/750 (same)
gold/chrome legs, gold calipers
300mm rotors
850 springs
30mm offset, 54mm lower clamp
Right offset ignition top clamp, 25mm bore

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2006+ 600
gold/ chrome leg, black calipers
310mm rotors
900 springs
30mm offset, 53mm lower clamp
Left offset ignition top clamp, 28mm bore

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2006+ 750
black/ bronze leg
310mm rotors
1000 springs
30mm offset, 53mm lower clamp
Left offset ignition top clamp, 28mm bore

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Calipers:

03/04 1000 and 04/05 600/750 (fit 300mm rotors std)

* The 03 1000 calipers are 4 pads per caliper - look the same as the two-pad variant
No interchangeable re pads however

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All other GSXR models

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Yamaha Monoblock (R6)

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Caliper/Rotor Matrix:

Calipers can be utilized from all the models above, by using spacers* per this matrix.
* Note that although for some sizes it says N/A, this means the combo would be too tall;
however, you could actually machine the caliper (or fork leg stanchion) as opposed to a spacer

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Triple Clamps:

You can mix & match a bit here:
The ideal top clamp I believe would be the 04/05 600/750 clamp
This has ignition offset to the right (same as SV and more conducive to the Vee shape of the front of the speedo for naked)
It has a 30mm offset and a 25mm bore.
Direct fit on 04/05 l600/750 lower triple clamp/forks
To fit on 06+ 600/750 forks/lower triple, bore stem hole to 28mm
To fit on 05/06 1000 bottom triple, bore stem to 28mm

If you have no access to machining, then the 05-06 1000 top clamp will fit directly on the 06+ 600/750 steering stem. This clamp has ignition 'straight ahead. The steering lock WILL lock, albeit with the wheel straight ahead, as opposed to the conventional full left position.

06+ 600/750 top clamps obviously 'fit' their own forks/bottom triple, however, the ignition is offset to the left; it requires some machining of the ignition module to avoid interference with the frame on the left side and the steering lock will not function without drilling frame. This makes it a less ideal choice.

Bottom clamp:
03/04 1000 has 32mm offset, 54mm bottom fork dia, and 25mm stem
05/06 1000 has 30mm offset 54mm bottom fork dia and 28mm stem
04/05 600/750 has 30mm offset, 54mm bottom fork dia, and 25mm stem
06+ 600/750 has a 30mm offset, 53mm bottom fork dia, and 28mm stem

Note that 06+600/750 forks are 53mm at the bottom clamp diameter - the others above are 54mm; so consider that as you wish to mix/match bottom triples & forks.

Axles:

The wheels are comparable fitment for all 01+ GSXR;
However, the axles change with the fork generations;

For the first group of forks per the caliper table above (03-04 1000 or 04-05 600/750)
uses an axle & collar nut (same as SV1K actually)
Note that there is no additional wheel/axle spacer required.

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For the second group of forks (05+ 1000 or 06+ 600/750)
the axle has a threaded bolt, rather than a collar nut, with a separate spacer that goes between the wheel & right fork leg.

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Steering Bearings:

All GSXR forks in the range above have 30/55/17 top & bottom bearings.
All Gen 2 SV650 and SV1K are the same sizes also
Gen 1 SV650 is the same bottom bearing but requires a special top bearing from TWF Racing.

Wheels:

All GSXR wheels after SRAD will fit any GSXR forks described above
The rotors change sizes (and fitment) however

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Mix n Match Capability for Wheels/Rotors:

01-04 1000 and 01-05 600/750 and SV1K all are the same wheel dimensionally;
Will take 300mm rotors from 03-04 1000, 04-05 600/750;
Will take 310mm rotors from SV1K;
Will take 320mm rotors from any 96-03 600/750 or 01-02 1000 or TL, or Hayabusa

05-08 1000 and 06-07 600/750 take 310mm rotors only, from these years of the wheel only.

09+ 1000 and 08+ 600/750 take 310mm rotors only - note that these rotors are NOT compatible with the group immediately above & vice versa.
 
#694 ·
Hi guys in advance thanks for that guide, its a hard job and u are doing it easier a bit. I bought a few days ago one SV 650 N k4, and it come with a bended both front disk, and one fork too, left one. Here in my country they are expensive to repair or buy as OEM, and im looking for swap it to GSX-R, the thing is i've no machine to milling or fitting aswell, so im looking for the parts who work/fit together w/o modify so hard, i wanted to keep my "drive possition" (mean bar possition, is confy for me) so i dindt understand what exactly i need, and i've a doubt with the front wheel too i was thiking about one ligther like marchesini or somithing like that but from one OEM bran. Thanks for advance guys !!!!
 
#695 ·
... im looking for the parts who work/fit together w/o modify so hard, i wanted to keep my "drive possition" (mean bar possition, is confy for me) so i dindt understand what exactly i need, and i've a doubt with the front wheel too i was thiking about one ligther like marchesini or somithing like that...
The opening post shows which permutations of parts you can mix & match - however the simplest way to go is just to source everything from the same model generation.
Keeping the same bar position, on a naked bike you will either have to buy a special triple clamp or modify a GSXR one to take handlebar risers - the alternative is to go to the GSXR clip-ons which requires no mods but does not sound like you want that.
Re the wheel, get whatever you want but whether GSXR or after-market, again get the generation that matches your GSXR forks NOT an SV wheel.
 
#696 · (Edited)
So I'm planning a GSXR fork retrofit on an SV1000S. I have been reading the whole thread from the start and currently up to page 54 but I couldn't wait.
Here is my parts plan from the top, and I'm assuming that SV650 and SV1000 front end geometries are the same?:

-04-05 GSXR600-750 top triple - and get the stem bored out from 25mm to Diameter = 28.0mm

-06 GSXR1000 forks

-06 GSXR1000 lower triple and stem

-06 GSXR1000 axle

-06 GSXR1000 calipers

-GSXR wheel spacer (part #7) <= (click) + Stock SV1000 wheel

-Stock 310mm SV1000 rotors

I am confident everything will be a correct fit but just want to make sure..
 
#697 ·
You will also need to trim the part where the steering damper bolts in to the frame. You may need clip ons raisers if so then you will need the do the following, re-route or new throttle cables and new brake lines.
I did all that ypu mention and all this above on my 03 SV1000S with the eception that all the part where from a 07/08 gsxr750.
 
#699 ·
I have 07 750 forks in matching triples with R6 calipers and a stock front wheel/rotors. I didn't have to trim anything. Steering stops line up. Steering damper doesn't mount up.
 
#703 ·
Damn good job gathering all this data!
Quick question; do all of these suspension "replacements" perform better than the stock SV1000's? Or are we replacing everything for looks? Different ride-styles?

The reason to why I'm wondering is because I got the springs replaced this winter, my mechanic said that the stock ones were shait (and 10 y.o.).
Guess I just want to know if replacing the whole set would be better that swapping springs..?

I race my bike for fun at the track, and use it for daily commutes during summer.
 
#713 ·
I feel bad asking this, i've attempted to research this a bit to no avail. I have an 06 650. Someone locally would give me a great deal on a 2002 750 complete tripple tree that to my knowledge is a good fit due to the ignition location being on the correct side . He has the forks as well but i want gold forks, not silver. What forks would be compatible with the tripple tree thats gold for a 2nd gen sv?

Any input would be very appreciated.
 
#716 ·
I just wanted to say thanks for everyone's hard work and research, I've successfully installed an 06 600 gsxr front end on my naked first gen SV with 05 1000 gsxr top triples.

some things I came across with the swap was having to grind down metal on the where the steering lock is on the ignition so that It when turning the top triples, the ignition doesnt scrape the frame and having to make one of the torx holes in the ignition a little wider so that it would clamp on properly. Steering lock does not work, but all I'd need to is to widen the groove on the frame where the steering lock is supposed to be.

I also had to make a washer to fit between the two steering lock nuts. basically I took the old washer that went under the SV's top triple nut and dremeled the heck out of the washer until it fit and aligned on the gsxr steering stem.

everything works, no extra spacers needed, cable are a little long and now my throttle doesnt seem like it wants to open all the way, took off the tube and made the cable straight didn't make any change...will try some lube on it later.

Haven't tried pulling in my clutch lever to test the cable since my clutch lever is in the mail.

again, thanks all!
 
#717 ·
:) I ran into the same situation with my 2006 GSXR 600 Forks on my Gen 1 SV650. I had the guys in the machine shop measure and create this Billet Aluminum Bracket.

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It is machined to it fit around and capture the fairing stay and provide solid portions to act as the Steering Stops at the same distances as the OEM steering stops would have been. Uses the same bolt holes as stock or aftermarket Fairing Stay.

If you find them a bit bulky for your tastes you can trim them down but I found them to work fine so I left them,

Here is the bike I had them made up for,
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I have 3 more of these for anyone looking for an easy bolt on fix for the Steering Stop issue: $80 each Shipped anywhere in the lower 48. If you want them anodized in Black add in $12.

Email me Directly at b.layton@svracingparts.com for one of these 3, No more are being made,

Very nice solution to the steering stop question,

Enjoy the ride, and best regards,
Blair
 
#719 · (Edited)
Alright so I've gone on 5 rides each 2-3 hours long and noticed consistently that my bike feels as if it slightly wobbles left and right; overall control of the bike does not feel stable at all with my k6 gsxr 600 front swap with k5 gsxr 1000 top triple on my gen 1.

Things ive tried to remedy the problem, make sure the forks are installed evenly, adjusted the settings on the forks, tightening the top steering lock nut to 60ft lbs of torque. (Lower steering lock but was installed to Suzuki specs with 1\4 turn back out). Made sure my rear tire is aligned using the markers.

Is my bike wobbling because my k6 gsxr 600 wheel could be bent or needs to be balanced?
 
#721 ·
Checked my tire and it isn't cupped, worn properly. The bike feels like its diving heavily into turns and on straights it feels like a wobble. At high speeds the bike feels OK. My guess is that the front swap dropped the front end of my bike too much and now I need to drop the rear with some new links. Anyone have information on supporting this? If so thanks! Would help with understanding the swap as well.
 
#727 ·
+1

!! So I've been putting more miles on the sv with the new conversion and the battlax tire that came with it. Noticed that the tire is cupped kinda funny plus along the center treads there are actually tiny dips at the tips of each tread line, weird. But I think you're right right when you suggested getting a new tire.

So I'll be looking at getting a PR4 to match my rear pr4. As for the heavy dipping, I guess I just had to get used to that with the conversion, I was considering getting some adjusting lowering links to adjust the dipping into to the turns.