How wide of tire?

  • MTH76
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How wide of tire?

03 Feb 2012 12:19
#501737
I am putting a GS1000 swing arm with a 3.5 inch wide rim on a stock hub.
With no offset on the countershaft sprocket can I use a 150 wide or go with a 140.
I know alot of people use this combination so any help would be great.
1976 KZ900 1075 head ported,over-sized intake valves shim under bucket Z-4 cam motion cams 34mm RS carbs back cut trans GS1000 swing arm with 3.5" Sun rim MotoGPwerks stainless steel pipe

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  • dshelly
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Re: How wide of tire?

03 Feb 2012 12:59
#501743
Go till it rubs and back off one size. :P
Occupation:Machinist 25+ exp.
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'76 Kz900LTD

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  • andy9802gt
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Re: How wide of tire?

03 Feb 2012 15:09
#501771
I've got a 150 on mine, it's close but it clears the chain. I'm not running a GS swinger though.
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm

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  • z1kzonly
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Re: How wide of tire?

03 Feb 2012 22:26
#501878
Hi Mark, Convert to 530 chain set up. You will gain 1/4 a side. The 150 tire will clear no problem
I have a 3/8 offset on a 4" Hog wheel with a 150 tire. But that has a big EK630 drag race chain

That is a nice swingarm and wheel set up you have. How much for that whole set up? with the brake set up.
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Went thru 25 of these in 40 yrs.
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  • mark1122
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Re: How wide of tire?

03 Feb 2012 22:56
#501888
a lot of guys have dif wheels or arms. the best thing to do is just put the rim and tire on. then use a straight edge or string line to figure out the sprocket offset yourself.

z1kzonly u may want to check your specs,a 630 to 530 will not save a 1/4" per side.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
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  • toad
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Re: How wide of tire?

05 Mar 2012 06:48
#507870
I have a gs1100 swinger with 530 chain and a 150 tire on mine,although my rim is a 4.5 inch gsxr.If I remember correctly the 530 and 630 chain were quite similar in width but quite different in weight, the 520 is much smaller,opinions vary on that.the stringline method works fine for offset.
78 kz 1000
wiesco 1015
29mm smoothbores
gs1100 swingarm
gsxr rear

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  • Patton
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Re: How wide of tire?

05 Mar 2012 09:37 - 05 Mar 2012 11:24
#507885








1973 Z1
KZ900 LTD

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Last edit: 05 Mar 2012 11:24 by Patton.

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Re: How wide of tire?

05 Mar 2012 09:50
#507889
Reducing chain size from 630 or 530 to 520 narrows the overall chain width by 1/8", which provides an additional 1/16" between the chain and tire sidewall.

630 and 530 are each 3/8" wide -- same width.

520 is 1/4" or 2/8" wide -- 1/8" less overall width.

This applies when comparing differences between chains of the same design, such as two different size o'ring chains or two different size x'ring chains.

An o'ring chain or x'ring chain would be wider than the same "size" non-o'ring chain or non-x'ring chain.

Good Fortune! :)
1973 Z1
KZ900 LTD

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  • Patton
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Re: How wide of tire?

05 Mar 2012 11:04 - 05 Mar 2012 11:43
#507905
For more info and better pics:

www.z1enterprises.com/reference/chaintypesize.aspx

And OMR's excellent article in the FILEBASE:

www.kzrider.com/filebase/doc_download/42...-sprockets-and-chain

Good Fortune! :)
1973 Z1
KZ900 LTD
Last edit: 05 Mar 2012 11:43 by Patton.

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Re: How wide of tire?

05 Mar 2012 11:29
#507909
The "Secret Handshake" is in understanding how the last two digits manage to combine both decimals and fractions. :ohmy:
1973 Z1
KZ900 LTD

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