Wider rim with stock swingarm

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20 Jun 2012 17:13 #530562 by lstone
Wider rim with stock swingarm was created by lstone
Can anyone tell me if it's ok to lace a 18" 4.25 wide rim on the stock hub and run that with the original swing arm? I plan to mount a 140mm tire on that. If anyone has tried this and knows the limits of this modification I would be thrilled to know BEFORE I buy a rim and trial and error it.

Laurie

1977 KZ1000
2002 800 DRIFTER

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20 Jun 2012 17:58 #530569 by Drooz
Replied by Drooz on topic Wider rim with stock swingarm
I have run a 3.50 rim with a 130 tire on my 750 h2b and the chain came really close to the tire. I plan to use the same combo with my "new" 78 kz1000. The 78 kz currently has a 130 tire on a Lester mag and there appears to be about 1/2" clearance between the chain and the tire. I don't know about going to bigger 4.25 wheel and a 140 tire on the stock swingarm, but after a quick glance it looks do-able. My guess is, at worst, you might have to offset the countershaft sprocket a little to allow the chain to clear the side of the tire.

On my 77kz1000, I have a wider aftermarket 'arm and run a zx6r wheel with a 180 tire and no issues with a 5/8" offset countershaft sprocket.

Hopefully someone out there has tried your proposed set up! B)

'77 kz1000 (zx10r) Modified/Street
'81 GPz550 "TrackBike"
'05 zx10r Retro/Mod Sportbike 4 SALE!!
'02 zrx1200r Lightly Modified Street SOLD!!
'74 h2b 750 (FZ600) "Mongrel" 2 Stroke SOLD!!


"Invictus Maneo" - I remain unvanquished.

Kawasaki - Let The Good Times Roll!

Mississauga, Ontario. CANADA

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  • DoubleDub
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20 Jun 2012 19:18 #530581 by DoubleDub
Replied by DoubleDub on topic Wider rim with stock swingarm
How can you offset one sprocket and not another? Wouldn't that create wear/alignment issues?

A wider rim won't move the rear sprocket further out if it's using the stock arm/hub/etc.

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20 Jun 2012 19:31 #530583 by 650ed
Replied by 650ed on topic Wider rim with stock swingarm

DoubleDub wrote: How can you offset one sprocket and not another? Wouldn't that create wear/alignment issues?

A wider rim won't move the rear sprocket further out if it's using the stock arm/hub/etc.


+1 If you offset one sprocket you need to offset both sprockets.

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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20 Jun 2012 19:42 - 20 Jun 2012 19:42 #530585 by TexasKZ
Replied by TexasKZ on topic Wider rim with stock swingarm
Drooz is running a ZX6R wheel. That's a cast one, so the hub and wheel are one and in this case offset from the factory wheel, therefore necessitating an offset counter shaft sprocket.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Last edit: 20 Jun 2012 19:42 by TexasKZ.

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  • DoubleDub
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20 Jun 2012 20:14 #530589 by DoubleDub
Replied by DoubleDub on topic Wider rim with stock swingarm

TexasKZ wrote: Drooz is running a ZX6R wheel. That's a cast one, so the hub and wheel are one and in this case offset from the factory wheel, therefore necessitating an offset counter shaft sprocket.


I understood that - he was suggesting offsetting the front sprocket with the 4.25" rim from how I read his post.

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  • 4TheKZ1000
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20 Jun 2012 20:41 - 08 May 2013 00:43 #530594 by 4TheKZ1000
Replied by 4TheKZ1000 on topic Wider rim with stock swingarm
I have a 18 x 3.50 spoke on mine with a 150 tire. If I went any bigger I might have chain/sproket probs


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Last edit: 08 May 2013 00:43 by 4TheKZ1000.

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20 Jun 2012 21:48 #530619 by racer54
Replied by racer54 on topic Wider rim with stock swingarm
The 4.25 rim on a stock hub wouldn't be a problem. It's the tire that may cause some problems. I know a 130mm fits with clearance and have known some to run a 140mm tire. Some had no problems while others had interference problems. Tire profile makes a difference here...some will fit while others might not.

1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
The following user(s) said Thank You: wireman

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20 Jun 2012 21:57 #530626 by racer54
Replied by racer54 on topic Wider rim with stock swingarm
If you can find the spec's on the tires you can see which ones have a taller, rounder profile and which have a flatter profile. Also that 4.25 rim will flatten out a 140mm tire more then a 3.5 rim will so it will make a 140 tire basically wider.

1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
The following user(s) said Thank You: wireman

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21 Jun 2012 11:33 #530730 by Drooz
Replied by Drooz on topic Wider rim with stock swingarm

DoubleDub wrote:
he was suggesting offsetting the front sprocket with the 4.25" rim from how I read his post.


Quite right "DoubleDub". Thank you for the clarification. B) The sprockets must be aligned properly to avoid binding and wear. B)

'77 kz1000 (zx10r) Modified/Street
'81 GPz550 "TrackBike"
'05 zx10r Retro/Mod Sportbike 4 SALE!!
'02 zrx1200r Lightly Modified Street SOLD!!
'74 h2b 750 (FZ600) "Mongrel" 2 Stroke SOLD!!


"Invictus Maneo" - I remain unvanquished.

Kawasaki - Let The Good Times Roll!

Mississauga, Ontario. CANADA

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22 Jun 2012 20:35 #531095 by lstone
Replied by lstone on topic Wider rim with stock swingarm
Thank you for addressing my question about rim width and tire size. I am going to try the 4.25. We have measured available room on each side and it seems like it should work and by the sounds of your experience, it also seems to be possible. I do not plan to change sprockets or offset them. Thanks again.

Laurie

1977 KZ1000
2002 800 DRIFTER

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