[RebornKat02]

here is the difference between a pre 750 stem and a busa stem. Notice the threads stop at same spot?

This is the stem in a katana neck

I did not have the bearing cover in at that time, this was mockup stage
Another look at the Busa front


This was before doing the gauge change but it gives you a good look at the master cylinder and how the handlebar mount looks

For those with a pre, here is the wiring diag. I made up


The Chrome project post 98 gauge back plate being mocked up to fit the pre


What the gauge cluster looks like completed!

I have to say I really enjoyed this part of the project, seeing it finished and ready to ride!

Now, you asked about spring rates
Hayabusa spring rate is .850 kg/mm (stock)
pre and post 750 is .629 kg/mm (stock)


Let me say at this time that if you don't feel your skill level is where you would like it to be to tackle this mod, just let me know. I will build it, put a kit together with instructions etc.

http://cgi.ebay.com/ebaymotors/GSXR-HAYABUSA-1300-FRONT-FORKS-100-STRIGHT-/220612012456?cmd=ViewItem&pt=Motorcycles_Parts_Accessories&hash=item335d8029a8

link will only last for 2 days and this is a good deal! you get everything except the front wheel

the guy withthe eBay auction really scammed me. Just got the lower triple clamp and fork tubes. Nothing else listed in the picture. I just emailed the guy an hopefully I will either be refunded or reimbursed.

[ThAzKat]

I can't control EBAY! I got scammed on a front wheel during the process also! so now I have a large paper weight! paypal and ebay can take care of that for you!

[airforceranger49]

the guy withthe eBay auction really scammed me. Just got the lower triple clamp and fork tubes. Nothing else listed in the picture. I just emailed the guy an hopefully I will either be refunded or reimbursed.

file a claim with paypal... their usually pretty good about scammers

[RebornKat02]

I can't control EBAY! I got scammed on a front wheel during the process also! so now I have a large paper weight! paypal and ebay can take care of that for you!

I know man. I wasn't blaming you. I filed a claim and am waitig on a verdict. The guy won't respond to anything. A few friends are egging me onto ride down there and curb stomp him into the ground. Honestly, I'm starting to consider it.

[RebornKat02]

Thazkat, you have anything left over I might be able to use or is it just junk? I need the bearing, upper triple... Etc. Have calipers And wheel from a gixxer 1G. Fits nice. Need rotors too.

[connharrisfamily]

Great write up thanks

[ThAzKat]

Great write up thanks

Thank you! Feel free to ask any questions if you are serious about this modification.

[ckrue689]

Im building up a pre with a 02 gsxr rear swinger and rim, with an 07 gsxr 1000 rear shock, I have the forks and triples off the 07 1k and I would love to run those.. If I remember correctly the diameter for the tubes is 50 upper and 57 lower. Now here's my question, what clamps or stem should I run to be able to mix and match? Is the upper bearing the same size between the gixxer and the busa?

[ThAzKat]

Im building up a pre with a 02 gsxr rear swinger and rim, with an 07 gsxr 1000 rear shock, I have the forks and triples off the 07 1k and I would love to run those.. If I remember correctly the diameter for the tubes is 50 upper and 57 lower. Now here's my question, what clamps or stem should I run to be able to mix and match? Is the upper bearing the same size between the gixxer and the busa?

the upper bearing on a 07 gsxr is 30x55x17 and the pre kat is 25x47x15. I mentioned early in this thread about a link to go to for the bearing needed. I reccomend using the katana lower bearing, it is the same size as the gsxr. use the gsxr triple tree! the forks won't fit in the katana tree. Now please read back for all parts needed. you will need a wheel, rotors, calipers etc from the gsxr for this build.

[GSXFJim]

I don't know about the '07 stem length but the '96-'00 1k stem is shorter than the pre-Kat stem, I'd measure your 1k and make sure. Post the dimension and I'll check it against the '99 stem I have. I have a pic of the '99 stem and bottom clamp in a pre-kat frame somewhere.. I'll dig it up and post it, it shows that the upper bearing race on the stem is below the cone that is pressed in the Kat frame.

[ep87]

Im building up a pre with a 02 gsxr rear swinger and rim, with an 07 gsxr 1000 rear shock, I have the forks and triples off the 07 1k and I would love to run those.. If I remember correctly the diameter for the tubes is 50 upper and 57 lower. Now here's my question, what clamps or stem should I run to be able to mix and match? Is the upper bearing the same size between the gixxer and the busa?

I'm mocking up a Hayabusa front end to pre 600 swap. And ThAzKat is correct you'll need the TWF top bearing. Its the one the SV guys use to swap to gsxr forks $45 shipped, kind of expensive but I don't think you'll find it any where else. So yes GSXR and Busa stock top bearings are the same 30x55x17 the convertion bearing from TWF is 30x47x15, so it will fit the katana neck and the Busa/gsxr stem.
Richard

[Superloki24]

I have a question about the speedometer, is a post speedo an easy swap into a pre dash? Keeping in mind that I have purchased the sprocket cover and sensor.

Going to pick up the Busa front end this weekend......

[Superloki24]

Bump....
And I also have another question, may seem redundant but whatever. In the first post picture you still have teh bottom race of the Busa on the stem, and I assume that you have to take this off to have it fit up into the stem of the Katana, but how did you take it off. I have tried heating it and cooling the stem but I can't get it to budge.

Any help would be appreciated. Oh and its an '08 Busa front end that I have.

Thanks,

[ThAzKat]

I have a question about the speedometer, is a post speedo an easy swap into a pre dash? Keeping in mind that I have purchased the sprocket cover and sensor.

Going to pick up the Busa front end this weekend......

My second one was a lot easier than my first one. With the second gauge setup I used the bezel surround off the post and shaped it and the pre fairings to match.

Bump....
And I also have another question, may seem redundant but whatever. In the first post picture you still have teh bottom race of the Busa on the stem, and I assume that you have to take this off to have it fit up into the stem of the Katana, but how did you take it off. I have tried heating it and cooling the stem but I can't get it to budge.

Any help would be appreciated. Oh and its an '08 Busa front end that I have.

Thanks,

I used a dremel to cut the race off and the katana bearing is a press fit to go on. Don't use a hammer unless you want a busted bearing.

I have to say at this point and a couple of riding seasons behind my belt with this setup that it is the cheapest way to go and get such a better ride and performance out of your katana.
This whole setup with a rear shock can be cheaper than tuning your stock katana forks with race tech and/or ohlins. Braking is crazy compared to OEM and adjustability of the forks is crazy compared to the lack there of with the OEM

[Tmod]

I have to say at this point and a couple of riding seasons behind my belt with this setup that it is the cheapest way to go and get such a better ride and performance out of your katana.
This whole setup with a rear shock can be cheaper than tuning your stock katana forks with race tech and/or ohlins.

What was the total cost for the entire swap?

Tmod