But, as he said, the 88~89 wheel really won't accomidate as wide a tire as he wants to run.  Using the GS components is a moot issue in a project like this...he should be going with a completely new swingarm, and using the propper GSXR components to match it.

...oh gotcha on the post...it just seemed really out there, lol.

The Sachs suspension I went with isn't too much better...well it's actually crazy better but me and my girl managed to use all but about 25mm of it last weekend on some mild twisties.  I needs me an ohlins piece...

i've done the 90 GSXR 750 swingarm
it fit
but sucked in the application
i had to narrow the pivot area sooooo much
then had to space out the foot pegs 3/4 inch with ugly blocks to clear the swingarm

yeah it fit
but .....

i'm doing the RGV braced arm now with a really kewl 5.25 BBS wheel

I was talking about a newer swingarm...of course it's really moot which era swingarm he'd use.  It'd at least look cooler, but yeah, it'd be wide as hell...but it'd fit the tire he wants.

What bbs wheel?  I don't think I've seen a bbs motorcycle rim...

 

i think it is a 10 or 12 spoke
also got a brembo brake caliper for it

i'll take a pic some day of it

just stuff sitting on the floor

also got a sweet set of PM's  5x17 rear(fzr600 stuff)

mak.... you need an extra 6.0x17 (gsxr750 99 white missing rotor)  ?

crap I don't but if I'd known you had it I could have hooked youup with a buyer...lol.  As it is I sold him my TL rim...I may go looking for a spare, though...I have this "itch" to put it on my EX500 to match the TL1000S forks and front wheel...

Awesome ideas everyone.  I appreciate all of the input; this has turned into a cool thread.  I always enjoy when the knowledgeable among us step forward and give their input.

Basically, as we all know...anything can be done.  It's just a matter of how much time and money one is willing to spend.  I was basically looking for a semi-simple project, and it looks like putting a 180 or 190 on a GS isn't going to be very simple.  As you guys have stated, the problems seem to be two-fold.  First, the tire will likely rub the swing arm.  Next...the wheel and hub assembly is too wide to fit the 8.5" GS axle on most wider wheels.  I'm having trouble finding measurements for early 90's GSX-R wheel/hub assemblies.  I can't seem to find the width anywhere.

Makenzie, the tire you tried was a 190?  It was mounted on a rim, right?  I know...silly question.  Does anyone know the average width of a 180 or 190 tire with an aspect ratio of 55?  I know it will be close...but I still feel like a 180 should fit.  The link I posted earlier on in this thread shows the guy who fit a 190...but he's never told anyone how well it works.  His chain alignment could be terrible, his rear brake may drag badly and he could have ground down the swing arm (!!!), we don't really know.

I'm not really looking to make a huge project out of this, though finding and swapping a swing arm would be fun.  More than likely...I'll end up doing the 88-89 rear wheel swap and sticking with 160 rear rubber, while using the GS hub.  As I stated before, I am a Mechanical Engineer and my work has a full machine shop.  I have plenty of access to software, tools and brain power to engineer something to work...but I definitely don't feel like putting that much effort into the project just so I can say..."check out that bitchin' tire!"

Thanks again guys,

-Turd.

faster easier swap is the 98-04? kat 600 4.5x17 rim.....the brgs are 17mm id....direct swap with some spacer adjustment
and a 170 will fit a 4.5

it the tire rubs the chain....run it for a few minutes....it will fix itself
or trim it with a razor blade
have to do the razor mod on a gsxr750 rim on a FZ600 swing arm

A 180 tire at the sidewalls is 180mm wide (or roughly 7").  A 190 is 190mm wide at the sidewalls (or roughly 7.5").  The first number is the actual width in mm in most cases.  The aspect ratio is the height's percentage of the tires width.

...if I understand how tires work correctly, I could be wrong.

im doing something similar,TF. im just going to get my swingarm extended and widened. Why you ask? Checking title and registration....

Quote from: makenzie71 on March 15, 2006, 08:08:22 PM
A 180 tire at the sidewalls is 180mm wide (or roughly 7").  A 190 is 190mm wide at the sidewalls (or roughly 7.5").  The first number is the actual width in mm in most cases.  The aspect ratio is the height's percentage of the tires width.

...if I understand how tires work correctly, I could be wrong.

Yeah, you are right regarding the "section width" rating of a tire;  i.e. 180 does mean it is 180mm wide.  All tires have a slightly different ACTUAL width though, usually with a standard deviation of 5mm.  The actual width is also affected by the width of the wheel, as a big tire can get pinched on a small rim--thus making the width of the tire smaller..

-Turd.

I just happen to have a 180 pirelli diablo in the other room. New tire that hasn't been mounted and it's 7 3/8" wide.

EDIT: changed question...

Will the GS hub fit the katana wheel?

-Turd.

ask Dgyver....he has it sitting in shed
i do believe it does
but if not the kat one will work....you are a M.E.

a lathe and mill are your friends.....wish i had access to a mill

Yeah, according to bikebandit, the hub shock absorbers are the same as the GS ones, so I'd imagine the only difference in the hubs is the sprocket alignment.

Give me 2 weeks and I'll have the Katana wheel on the bike, I'll report back and write up a little "how-to".  I'm going to fit a 170/60, close enough to my goal of 180 or 190.

-Turd.

I'm still unsure why not fit a whole rear off a gixxer?  I really think the bike would look sick with a braced swingarm off a later GSXR and a 180 in the rear.

mak
measure a late GSXR swingarm at the pivot
then measure a GS (same place)

then figure out how you can cut that much metal off and still have a swingarm left

the frame at the pivot of a I-4 is....10-11 inches

GS is 8-9

the rear arms of the swingarm are welded at a point wider than what ya need to fit in a GS frame

part of the reason i got rid of the VFR SSSA.....had to cut way tooo much off

another thing to consider when swapping for a significantly wider wheel (like a full gsxr rear swap) is the chain alignment will be way off between the rear sprocket and the front sprocket. Enough I'd guess to affect wear rates at the very least.

interesting project, and I for one can appreciate a good project for the sake of just doing it (see my site). Definitely document the process (pictures and write up) of whatever you decide to do, whether you get it to work or not so we can post it in FAQ forum.

Werase...the VFR swinger is actually a poor choice for just about anything.  I use the NT swingarm for almost everything.

Also, most modern Zooks run 244mm at the pivot (about 9.6").  The bandit 400 swingarm I thought was a direct bolt-in and it's 230mm.  Doesn't seem like too much to trim off.  At any rate, trimming the swingarm is NOT the right way to go about it.  The propper way is to cut the stock swingarm lugs off the subject bike and mount plates for the new swingarm.  I'll post pics of what I'm talking about in the next day or so...I have an old CB I did this to.

Pablo...I think that chain alignment wouldn't be too dramatic an issue.  He's looking at running the chain about 3/4" off center...that's about 3~4*.  Steel sprockets and a quality chain will hold up decently.  I ran an RK on my CB ratbike and aluminum sprockets with a 7* pitch and it chewed my sprockets up in about 2400 miles...almost rounded them.  I put steel sprockets under the same chain and the bike's got 11k on that setup.

Well, I hope werase...I hope you were right about the Katana wheel...I've got a 98-03 wheel and rotor on the way to my house.  It looks like it will fit...I'll be out of town all next week, so I'll report back in a few weeks on how the swap is going, complete with pictures.

Anyone want to buy a factory GS wheel, rotor or tire?  1000 babied miles, not a flaw on anything.

-Turd.