GS1150 wheel on GS1000

[TheCafeKid]

Also, is there enough lip support on these to run a radial? It never occurred to me to ask when I did it. Is the 83 GS1100E (matching spoke pattern, 19" wheel) wider? I seem to remember it being 2.25 but I may be wrong. You could try a 700/750 wheel. They'll run a 120 front without pinch so I'd imagine they'd have to be wider. But they're only 16" so that wouldn't work huh...?

[blowerbike]

the 1150 3" & 3.5" are the same except for the width.
in the states the 84 ES came with the 3".
the 85E-ES/86E had the 3.5" rim.

[blowerbike]

i do not recall the exact amounts we added but it can vary as the swing arm is bowed out quite a bit.
it took spacers on both sides of the caliper hanger if i recall correctly.
adding to just one side let the caliper be off center and the rotor would grind the hanger and or caliper.

[John Kat]

B*gger... If I'd have thought about this last week it would have taken me about 10mins. Right now I have the 2.5" wheel on there so it will take a bit longer!

John - One thing that crossed my mind. You are using the 3" 1150 wheel (taken from your 2nd to last post). What I have & I believe what Josh used is the later 3.5" wheel. It's possible there could be a difference between the two....

I will do some measuring asap. I think the same might be achieved by measuring from the bearing face to the lip of the wheel on each side & then if necessary measuring the spacers. I think I have enough measuring gear to do it this way. I haven't thought it through 100% as yet but I will let you know.

In fact I have both versions of the 1150 wheel.
The 3" version on my GS 1000 ST and the 3.5" on my GS 1100 SZ Kat.
Both have the offset...
I got to the 4 mm offset ( on the 3" wheel) by using the method you describe above but it's a pain to do and I'm concerned about the accuracy.

[GSexpress]

The bearing spacing on the 1150 wheel is narrower than on the 1000 wheel. ( the distance from the outside of the left bering surface to the outside of the right bearing surface.) The only way to compensate for that properly is to use spacers on each side of the wheel at the bearing. Inside the brake mount and inside the cush drive hub. 2 - 3 MM each side. This lines up both the brake stay and the sproket and keeps the wheel centered.. If you need to off set the chain side more for tire clearence, you need to add more to the spacer at the bearing and cut the same amount off of the stock spacer on that side as well as add the same off set to the drive sprocket. No more than another 4 MM or you'll end up with too much slop in the cush drive. Another trick for stuffing in a wider tire that I used for racing was to trim some rubber off of the edge of the tire. But keep in mind it takes some skill and presision. Tire cutting has become a lost art. I used to make my own rain tires from slicks, and custom cut my dirt knobbies, for racing purposes back in the day.

[salty_monk]

Adding spacers to each side wouldn't help with any rim offset. I am intrigued now!!

Better get the measuring gear and laser lines I guess!

Josh 83 1100 is 1.85 19". 700/750 is 2.15 from memory.
The 82 Gs850 I have is the widest 19" at 2.15 as far as I know.

[GSexpress]

There is no offset, people just think there is because they can't get bothe the brake rotor and the chain to line up because they're putting the spacers in the wrong places. But please do measure to find out for yourself and let us all know what you find. A metal yard stick or straight edge across the rim and another ruler down to the bearing on each side is all it takes, save your laser batteries for something truly complicated.

[John Kat]

The measurements I took were along those lines.
I compared a GS 1000 S 18*2.15" wheel to a GS 1150 17*3" wheel.
First both wheels have the same bearing to bearing distance: 111 mm
On the 18" wheel the left bearing is countersunk by 10 mm from the wheel outer edge that in turn is 60 mm from the wheel Center Line.
On the 1150 wheel the same dimensions are 12 mm and 66 mm.
This means that by using the same left spacers for both wheels the 1150 wheel will be offset to the right by (66-12)-(60-10)=4 mm
I also measured the 17*3" wheel on my 1100 KAT SD and it comes out at 12 and 62 mm which means that the GS 1000 and GS 1100 have the same offset as (62-12)-(60-10)=0 mm.
I hope everyone is now convinced or did I make a mistake somewhere?

[salty_monk]

I have both a 2.5" 750ES/831100 wheel and the 85 GS1150 wheel not mounted. The 2.5" has a tyre mounted but it needs to come off anyway... The 2.5" was just mounted on the bike & has run over 2k trouble free miles so I know that one fits (and the way it fit was identical to the stock 78 wheel which I now have fitted).

Yes - I have a bunch of wheels If I get this to work without spacing out sprockets etc the 83 1100 full set will be up for sale.

I will measure them both up asap.

John, I kind of get what you did but I am a bit lost about why you mention the wheel outer edge. Do you mean the outer edge of the rim or the outer edge of the hub? (where you stick the bearing inside). If the latter then that could be an issue with your measurements as that bit does nothing to locate the wheel on the bike.

Personally I am completely open minded on this, I just want to get it right. I will try to take some pics as I go.

GSExpress - yes I think I'll only need the lasers if I mount it in the swingarm to measure the rim to the swingarm inner - to make sure it's straight

I will measure the Avon 130 the same way you did with the blocks above as well as Avon quote it at 140 width which could explain why I only have 10mm there the same as you.

Dan

[blowerbike]

is the only difference in the 83750/1100 rim the bearing sizes?
for some reason i thought the rims was a little different.

[gmansyz]

Wheel Centered?

May I say something? Measuring is all fine and such, but bikes are different. There are production tollerances to take into consideration. I would first center the wheel with the cush drive on. Then adjust the caliper bracket so the caliper is centered over the rotor. Make sure there is minimal clearence between all spacers and the swinger so nothing moves when you tighten the axle. Only then, do you see clearence between the chain run, tire and frame. A note: A 150 is much too wide for a 3.00" wheel. Just because it can be wedged on doesn't make it right. Just as a 200 and a 210 can be put on a 6 inch wheel, doesn't mean it should if you want the correct profile and contact patch.
Now, theproper size tires for each width wheel.
120-2.5"
130-3.0"
140-3.5"
150-4.0"
160-4.5"
170-5.0"
180-5.5"
190-6.0"
200-6.5"
210-7.0"
Thanks for listening.
Laters
Greg

[John Kat]

John, I kind of get what you did but I am a bit lost about why you mention the wheel outer edge. Do you mean the outer edge of the rim or the outer edge of the hub? (where you stick the bearing inside). If the latter then that could be an issue with your measurements as that bit does nothing to locate the wheel on the bike.
Dan

Dan,The reason I referred to the outer edge of the hub is that it's a reference point to get to the net offset.
The net offset beeing the distance between the wheel center line and the edge of the bearing.
In other words the net offset for the GS 1000/GS1100 wheels is 50 mm while the net offset for the GS 1150 3" wheel is 54 mm.
The reason Suzuki increased the offset is most probably to make sure there was enough clearance between the tire and the chain.

[John Kat]

Now, theproper size tires for each width wheel.
120-2.5"
130-3.0"
140-3.5"
150-4.0"
160-4.5"
170-5.0"
180-5.5"
190-6.0"
200-6.5"
210-7.0"
Thanks for listening.
Laters
Greg

I fully agree and that's why I have not used a 150 tire on my 3.5" rim.

[salty_monk]

is the only difference in the 83750/1100 rim the bearing sizes?
for some reason i thought the rims was a little different.

Yes, I just needed to buy a new bearing & spacer set. Other than that they are identical I believe. Fit my 1000 great

GMan - I agree with what you're saying but this is from Avons page:

Roadrider AM26 (rear) 150/70-17 (69V) MT4.25 3.50 - 4.50 156 6.1 656 25.8 7.5

States 3.5 - 4.5 rim is acceptable. - I have a 3.5. - I still might go with a 140, I haven't ruled that out as yet... Also still deciding between brands (not fixed to Avon) & whether I want to run 100 or 110 front tyre. I've run both in the past (110 on the 2.15 rim).

http://www.avonmotorcycle.com/

John - I need to think about it more. I think I get what you are saying but I don't believe it works like that as the edge of the hub is irrelevant to where the wheel ends up in the swingarm as it doesn't touch anything..

[blowerbike]

i disagree...
suzuki used a 150/70 on a 3.5" wheel on a 89 750 katana.
i used the same tire(parted out 750 kat) on my 85 1150E.
fit and looked perfect.