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Old Streetfighter Motorcycle Forum Post 05-11-2013, 01:44 AM   #1
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Question Katana front end swap fork and wheel question?

So i got a 2009 GSXR front end to swap out on my 1999 katana, I would like to use the front wheel, tire, and rotor setup from the katana as they are fine but the axles are different on the two, Is there anyway to make this work? Can I get a different bearing for the katana wheel that will work with the GSXR axle? Is there a bushing I can buy to work with the katana axle? Will the older hayabusa Axle work? I'm lost on what to do to remedy this, would rather not have to buy a GSXR front wheel, rotor, axle, tire... Appreciate any help... Thanks!!!!
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Old Streetfighter Motorcycle Forum Post 05-11-2013, 12:04 PM   #2
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Default Re: Katana front end swap fork and wheel question?

You'll be better off swapping all the components. The calipers are different, the gsxr has radial mounts, the kat has the other kind (forgot the name). I believe the rotor diameters are different, and the bolt pattern might be too.

Then there is the wheel hub width and fork spacing.
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Old Streetfighter Motorcycle Forum Post 05-16-2013, 01:48 PM   #3
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Default Re: Katana front end swap fork and wheel question?

there is a fork swap comparision chart on here somewhere that tells what bikes share common neck bearing sizes.i put a katana 600 fork on my 86 gs550 es and it was pretty much a bolt on.i remembered allballs racing chart that i have posted on another forum. http://www.allballsracing.com/index.php/forkconversion

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Old Streetfighter Motorcycle Forum Post 05-16-2013, 01:56 PM   #4
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Default Re: Katana front end swap fork and wheel question?

i just looked at the chart.most gixxers share the same bearing sizes.that doesn't nessecarily mean the stem height is the same,though.

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Old Streetfighter Motorcycle Forum Post 07-16-2014, 08:02 PM   #5
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Default Re: Katana front end swap fork and wheel question?

My bike is a 2001 GSX750F, my donor front is a 1998 TL1000S.

I just looked at the chart, followed the sites instructions, and if I did it right then it should work unless I read this wrong, and obviously pending the stem length.

Could anyone confirm these findings please.

UPDATE: Did some more homework, lower bearing is the same OEM bearing for both. But the uppers are different, the Kat (25X47X15) and the TL (30X55X17).

Still haven't found stem lengths, or any confirmation on the upper bearing offered being correct.

Any input would be greatly appreciated.

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Old Streetfighter Motorcycle Forum Post 07-19-2014, 11:18 PM   #6
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Default Re: Katana front end swap fork and wheel question?

Two sets of replies.
Quote:
Originally Posted by Katrider View Post
So i got a 2009 GSXR front end to swap out on my 1999 katana, I would like to use the front wheel, tire, and rotor setup from the katana as they are fine but the axles are different on the two, Is there anyway to make this work? Can I get a different bearing for the katana wheel that will work with the GSXR axle? Is there a bushing I can buy to work with the katana axle? Will the older hayabusa Axle work? I'm lost on what to do to remedy this, would rather not have to buy a GSXR front wheel, rotor, axle, tire... Appreciate any help... Thanks!!!!
To start off, if I remember right, the GSXR front axle is around 25mm diameter and the Katanas are 15mm or 17mm depending on the generation. (Please correct me if I am wrong on this one guys that own GSXRs.)

http://www.gotbearings.com/

Using the above link, if you look for the GSXF bearings (6203 series from All Balls) that are 17mm inner and 40mm outer, you can find a lot available. When looking for a conversion, you find one linear bearing with 25mm inner and 40mm outer, this would tell me that there isn't a likely source for a bearing swap.

Then using a database from:

https://www.metalgear-shop.de/

You can look up the differences in the rotors. (Let's ignore the radial and conventional calipers for the moment.)

90s and 00s SVs, GSFs, GSXFs all use the 21.023 or 21.051 series brake rotors. The 2009 GSXRs use the 21.130 rotors.

The major thing to consider here is the outer diameter as you need the pads to correctly contact the rotors.

21.023 - 290mm OD
21.051 - 290mm OD
21.130 - 310mm OD

This would require a rotor swap if nothing else as you shouldn't be shaving 10mm off of the radial caliper mounts.

Rotors usually cost in the ball park of $50-$100 for the ones I have seen, but you can usually get a cheap wheel that will work well for non-track use with rotors attached for $100-$200 or lower if you are patient or don't mind a little rash.

Now, there is also the differences between the axle lengths to consider when thinking you might be able to create a set of bushes to take up the difference between the fork lowers and the GSXF axle.

Many factors involved, the easiest solution would be to get a GSXR front wheel to match.



Quote:
Originally Posted by Demonchyld View Post
My bike is a 2001 GSX750F, my donor front is a 1998 TL1000S.

I just looked at the chart, followed the sites instructions, and if I did it right then it should work unless I read this wrong, and obviously pending the stem length.

Could anyone confirm these findings please.

UPDATE: Did some more homework, lower bearing is the same OEM bearing for both. But the uppers are different, the Kat (25X47X15) and the TL (30X55X17).

Still haven't found stem lengths, or any confirmation on the upper bearing offered being correct.

Any input would be greatly appreciated.

Just as an FYI, this really should have been posted in its own thread as to not hijack from the OP.

I haven't found any issues with All Balls yet with providing incorrect information on the bearings, I use them a lot for research. I wouldn't worry about the stem length, I would get the top bearing and try to fit the TLS into the GSXF and if it doesn't work, swap the stems and keep the stock bearings fitted.

(I have the same numbers for bearing sizes as you posted, from All Balls, and they have stated the top bearing you need is a 99-3540-5

I am putting an SV650 front end onto a GS750 and a YZF-R6 front end onto an SV650, all of the steering stems are the same length.
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Old Streetfighter Motorcycle Forum Post 07-20-2014, 11:10 AM   #7
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Default Re: Katana front end swap fork and wheel question?

Thanks Casper!!! Really appreciate the reply, I can move forward with more confidence now, first time building so I have lots of noob questions.

Wasn't trying to Hi-jack from the OP, just figured it was a dead post from over a year ago and perhaps if I boosted it again, those whom commented before might be the best source of answers.

I will start a new one in the future, No worries and thanks again
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Old Streetfighter Motorcycle Forum Post 07-20-2014, 11:48 AM   #8
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Default Re: Katana front end swap fork and wheel question?

Must rep Casper next rime I'm on a computer

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Old Streetfighter Motorcycle Forum Post 07-20-2014, 02:22 PM   #9
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Default Re: Katana front end swap fork and wheel question?

Quote:
Originally Posted by Demonchyld View Post
Thanks Casper!!! Really appreciate the reply, I can move forward with more confidence now, first time building so I have lots of noob questions.

Wasn't trying to Hi-jack from the OP, just figured it was a dead post from over a year ago and perhaps if I boosted it again, those whom commented before might be the best source of answers.

I will start a new one in the future, No worries and thanks again
Oh, I tend not to look at the dates... oops.

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Originally Posted by DrJellyFingers View Post
Must rep Casper next rime I'm on a computer
Sweet!
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Old Streetfighter Motorcycle Forum Post 08-25-2014, 10:24 PM   #10
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Default Re: Katana front end swap fork and wheel question?

Thanks for the info guys, here it is before the TLS fork.



And after the swap



Bars are just loose until I get a new upper triple and clip-ons.



I need a garage...
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