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Largest tire size.
- KZ1911
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17 Oct 2010 08:59 #407194
by KZ1911
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
Largest tire size. was created by KZ1911
I am looking for the largest but safe tire size for my 1976KZ900.I am going with the Avon Roadriders.
I have some old and cracked sizes on.
front,100/90/19
rear, 120/90/18.
I think stock is 3.50/19 and 4.00/18.
I am not familiar with the metric sizes but i got a tape out and they look ok if i am reading it right!
It looks like there may be a little more clearence in the rear but the front looks to be close right now with the sizes on there.
Any help would be great.Thanks,Rex.
I have some old and cracked sizes on.
front,100/90/19
rear, 120/90/18.
I think stock is 3.50/19 and 4.00/18.
I am not familiar with the metric sizes but i got a tape out and they look ok if i am reading it right!
It looks like there may be a little more clearence in the rear but the front looks to be close right now with the sizes on there.
Any help would be great.Thanks,Rex.
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
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- otakar
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17 Oct 2010 10:02 #407204
by otakar
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Replied by otakar on topic Largest tire size.
The stock tires on that bike are 3.35 front and a 4.0 rear. in the Avon AM26 that you want to use that would equate to the AM26(Universal)100/90-19 front and the AM26(universal) 110/90-18 rear. But the roadrider is available in the original size of AM26(universal) 3.25-19 front and AM26 4.0-18(rear) rear. So just get the OE size and you will not have a problem with the spedo being off.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- otakar
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17 Oct 2010 10:05 #407206
by otakar
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Replied by otakar on topic Largest tire size.
By the way, those are excellent tires.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- KZ1911
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17 Oct 2010 10:16 #407207
by KZ1911
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
Replied by KZ1911 on topic Largest tire size.
Thanks for the info.Your right.I will stick with the OE
size.The KZ clymer manual i have states the front stock size to be 3.50/19 ? It is a clymer though.What do you think?
size.The KZ clymer manual i have states the front stock size to be 3.50/19 ? It is a clymer though.What do you think?
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
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- otakar
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17 Oct 2010 10:33 #407208
by otakar
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Replied by otakar on topic Largest tire size.
The Clymer is wrong. It is a 3.25 front. If you want to go with a 120 rear that would be no problem. You might even be able to fit a 130 without hitting the chain.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- KZ1911
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17 Oct 2010 10:39 #407209
by KZ1911
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
Replied by KZ1911 on topic Largest tire size.
That sounds about right.I thought it might be wrong.
I will go with the 3.25 front and 120/90/18 rear.
Really appriciate experienced info.
I will go with the 3.25 front and 120/90/18 rear.
Really appriciate experienced info.
1976 KZ 900.
1973 H1 500
2002 Fatboy 104ci.
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- DoubleDub
- Visitor
17 Oct 2010 17:32 #407273
by DoubleDub
Replied by DoubleDub on topic Largest tire size.
otakar wrote:
I fit a 130 to mine, but I'll be going back to a 120 after these. I think it adversely affected handling, I get a lot of slip when doing in-town slow speed intersections and punching it - more than I used to with a 120 (could just be the tires model as well).
The Clymer is wrong. It is a 3.25 front. If you want to go with a 120 rear that would be no problem. You might even be able to fit a 130 without hitting the chain.
I fit a 130 to mine, but I'll be going back to a 120 after these. I think it adversely affected handling, I get a lot of slip when doing in-town slow speed intersections and punching it - more than I used to with a 120 (could just be the tires model as well).
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- otakar
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17 Oct 2010 17:45 #407278
by otakar
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Replied by otakar on topic Largest tire size.
When you start putting wider tires on narrower rims, you wind up with excessive side wall flex. This will cause the tire to shift side to side as you start putting pressure on it in hi speed turns. That is definitely not what you want.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- 650ed
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17 Oct 2010 18:21 #407295
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Largest tire size.
Bingo! I ran 130's on the back of mine for years, but they don't work better (or maybe not as well) as 120's. The 130 tire ends up distorted because it's pinched on the narrow rim so there's actually no more contact patch than a 120. Plus they're a royal pain in the butt to mount. I won't be going back to a 130. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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