gsxr1100 front wheel

[HARTLESS]

What's more important than the rotor bolt pattern is the width of the Kawa hub...measure the distance between the faces of the hub, where the rotors contact the hub. If the width between the FJ and the Kawa rim is the same, that means that the rotors will be in the same location in relation to the FJ brake calipers.
Now about the bolt pattern, if they do match, you are good to go...if they don't match, all is not lost, now what you have to do is to find some 298mm rotors which fit the Kawa bolt pattern (300mm are ok also)
You won't be able to reuse your FJ rotors, but oh well, you can use the Kawa rim.

Keep us tuned in... An alternative to the rare '87/88 FZR1000 or FZR750R front rim is worth investigating.

Thank you!  Pat

I'll keep you tuned! It's hard to find specs on rotor bolt pattern sizes but from the source I found the katana has a 78mm pattern compared to fj's 80mm( correct me if I'm wrong ). I'll update when I get
Home

[movenon]

What's more important than the rotor bolt pattern is the width of the Kawa hub...measure the distance between the faces of the hub, where the rotors contact the hub. If the width between the FJ and the Kawa rim is the same, that means that the rotors will be in the same location in relation to the FJ brake calipers.
Now about the bolt pattern, if they do match, you are good to go...if they don't match, all is not lost, now what you have to do is to find some 298mm rotors which fit the Kawa bolt pattern (300mm are ok also)
You won't be able to reuse your FJ rotors, but oh well, you can use the Kawa rim.

Keep us tuned in... An alternative to the rare '87/88 FZR1000 or FZR750R front rim is worth investigating.

Thank you!  Pat

I'll keep you tuned! It's hard to find specs on rotor bolt pattern sizes but from the source I found the katana has a 78mm pattern compared to fj's 80mm( correct me if I'm wrong ). I'll update when I get
Home

Not hard to find the bolt pattern.... http://metalgear.com.au/searchByBikeModel.php?model_name=gsx+750&x=40&y=10   Pick which model, click the rotor and you will get full spec's.   The ones I glanced at the bolt pattern were different and the rotor was a bit smaller. also pay attention to the offset.
George

[movenon]

GSX 750 F Details
Measurements (mm)
Outside Diameter
290
Inside Diameter
64
Bolt Hole Circumference
86
Bolt Hole Quantity
5
Bolt Hole Size
10.5
Thickness
4.5
Minimum Thickness
4.0
Offset
19.5
Type of Bolt Holes
STRAIGHT



FJ 88-89 Details
Measurements (mm)
Outside Diameter
298
Inside Diameter
64
Bolt Hole Circumference
80
Bolt Hole Quantity
6
Bolt Hole Size
8.5
Thickness
4.0
Minimum Thickness
3.5
Offset
9.5
Type of Bolt Holes
STRAIGHT

And for some reason the GSX front rotor has something different between the right and left one. Also please note the bolt hole numbers and offset. I just picked 88-89 FJ because I don't know what year of FJ you are tryng to put it on, or I did 't catch that information.

George

[movenon]

I think these are the 1992 FJ spec's without and with ABS.

1992 FJ NON ABS
Measurements (mm)
Outside Diameter
298
Inside Diameter
64
Bolt Hole Circumference
80
Bolt Hole Quantity
6
Bolt Hole Size
8.5
Thickness
4.0
Minimum Thickness
3.5
Offset
9.5
Type of Bolt Holes
STRAIGHT



1992 FJ with ABS      
Measurements (mm)
Outside Diameter
298
Inside Diameter
132
Bolt Hole Circumference
150
Bolt Hole Quantity
5
Bolt Hole Size
8.5
Thickness
5.0
Minimum Thickness
4.5
Offset
10.5
Type of Bolt Holes
STRAIGHT

George

[Pat Conlon]

Thanks George, this is cool information. Would you mind if I created a post over in the Modification Files section with your link?

Very helpful indeed.

[movenon]

Thanks George, this is cool information. Would you mind if I created a post over in the Modification Files section with your link?

Very helpful indeed.

You are entirely welcome Pat. I used that link to scout out all the rear rotors that I could use with the GSXR rear wheel conversion. Today I have been looking over your digital shoulder and modifying my tail light. 
George

[HARTLESS]

ok, so the hub from rotor mount to rotor mount on the katana wheel is just under 9.25 inches so about 234mm according to googles converter (I don have anything that measures in mm at the moment). does anyone know what the measurement is on a 92 fj ( which is what I have )? thanks movenon for the information. so it seems as if I would have to get new rotors with 80mm bolt hole circumference and a 9.5 mm offset that has a 298 mm outside diameter correct? I think that I need new rotors anyways.

[Pat Conlon]

You already have the info. on the bolt spacing of your Katana rim, so that is what your rotor should be.
You need a rotor with a internal diameter to match 64mm, the outside diameter needs to be 298mm for the FJ calipers...what you don't know is the offset of the rotor, so measure your '92 rim and see what the difference is....then you will have a idea what offset you need...

[Edit] Ok, I just measured my '92 (non ABS) and outside face to outside face of the rotor is 142mm
And the thickness of each carrier frame is 6mm, total of 12mm
George's link shows a FJ rotor offset of 9.5mm (to the outside) on each rotor, for a total of 19 mm

Therefore the FJ hub width should be aprox. 111mm (4.37 inches)
. Are you sure the hub width on the Katana rim is 9.25 inches? Sounds awfully wide.
If so, then I don't think it's gonna work....
To fit your FJ, you need a rim that will put a set of 298mm rotors 142mm (5.6 inches) apart.
Hard to do when the Katana hub is already 9.25 inches wide....time to get your money back.

[HARTLESS]

You already have the info. on the bolt spacing of your Katana rim, so that is what your rotor should be.
You need a rotor with a internal diameter to match 64mm, the outside diameter needs to be 298mm for the FJ calipers...what you don't know is the offset of the rotor, so measure your '92 rim and see what the difference is....then you will have a idea what offset you need...

Ok, I just measured my '92 (non ABS) and outside face to outside face of the rotor is 142mm
And the thickness of each carrier frame is 6mm, total of 12mm
George's link shows a FJ rotor offset of 9.5mm (to the outside) on each rotor, for a total of 19 mm

Therefore the FJ hub width should be aprox. 111mm (4.37 inches)
. Are you sure the hub width on the Katana rim is 9.25 inches? Sounds awfully wide.
If so, then I don't think it's gonna work....
To fit your FJ, you need a rim that will put a set of 298mm rotors 142mm (5.6 inches) apart.
Hard to do when the Katana hub is already 9.25 inches wide....time to get your money back.

im not really sure of anything these days.... especially considering I don't know what the heck I was thinking when I put 9.25..... its really about 3.75 inches which means it would be at about 94-95 mm. im a mess apparently and I appreciate you guys not bashing me too hard. if we could just forget about that I would appreciate it!

[Pat Conlon]

Well, assuming you can solve the rotor offset exercise, now you do realize that you *may* have problems using your FJ's axle spacer and speedo drive due to the narrower Katana hub....?

[HARTLESS]

Well, assuming you can solve the rotor offset exercise, now you do realize that you *may* have problems using your FJ's axle spacer and speedo drive due to the narrower Katana hub....?

oh yea, and my plan was to wait until Monday and probably return it anyways. but I like talking about this stuff and learning, plus I am beginning to like this forum! I have recently been looking up ratings on the salvage yard I went to and it shows they might be kind of shady...they said they would do the work for me for an extra $20 but I don't know. sounds to me like he knows just as much about his as I do...which is hardly anything at all. hopefully I can get my money back because $100 is a lot of money to me.

[movenon]

Good move on taking back that rim... There a 2 other ways to replace your front wheel with a lot less hassle. Replace with another stock rim or wait and locate a 87/88 FZR rim. Lots of stock rims out there and if you shop around and take some time you can find a 87/88 FZR rim.

And not to add to the confusion there is a way to adapt a newer FZR rim BUT (there's that word again) it requires machine work it is not a direct fit. Or you could adapt a whole new front suspension in... It's only time and money.  Let us know how you come out on returning the rim.
George

[HARTLESS]

Good move on taking back that rim... There a 2 other ways to replace your front wheel with a lot less hassle. Replace with another stock rim or wait and locate a 87/88 FZR rim. Lots of stock rims out there and if you shop around and take some time you can find a 87/88 FZR rim.

And not to add to the confusion there is a way to adapt a newer FZR rim BUT (there's that word again) it requires machine work it is not a direct fit. Or you could adapt a whole new front suspension in... It's only time and money.  Let us know how you come out on returning the rim.
George

think im going to stick with stock unless someone has a 87/88 fzr rim laying around. im not too worried about the extra width, I don't plan on racing. I will keep you posted, maybe the wrecking yard has an fzr rim I can trade for.

[HARTLESS]

So, I took the katana wheel back and was glad to see that he gave me my 100 bones back. found another parts place that I had never heard of. called and he said that he had  wheel for me, well when I show up its off an 85 and wont fit on my 92, but he said I could look around. just as I was about to leave I looked up at the very top rack in the very corner at the last rim and tire tucked away so you couldn't see it. Hallelujah! looks like a match! but get this, I try to put it on and it fits but had to swap rotors, start to look at it a bit and its a 3.5" wide rim. Bonus, especially considering he only charged me $40 and it had a good metzeler tire on it. And he wants me to work in his shop. all in all, I feel like it was a good day, plus its nice to know that there are some motorcycle parts guys out there that aren't just in it for a buck....

[movenon]

Good deal ! Might the rim be an old FZR (88-87).. ? If so it was a real score, well for that matter if it works it was a score. . Glad it worked for you.     Please watch out if the Metzeler is to old, then get a new tire..
George