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Old 01-14-2013, 10:46 AM   #6871
crankshaft OP
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Originally Posted by motoged View Post
Tars...

130/80 vs 130/100.....the first number is the width of the tire and the second is the height relative to the width is what I think these numbers represent....if this is true....the "100" would be a taller sidewall.....

n'est pas?


And , yes, the EXC swingarms can take in water and it is a good idea to drill a 1/8 hole in the bottom of each swing arm a few inches from the back end....and check the holes occasionally as they can get plugged.
R U sure? I have a 100/100 rear and the sidewall is really short.
The 100/80 has a taller sidewall.
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Old 01-14-2013, 10:51 AM   #6872
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Originally Posted by crankshaft View Post
R U sure? I have a 100/100 rear and the sidewall is really short.
The 100/80 has a taller sidewall.
same brand of tires? I have seen differences in heights between brands. should be width/(height as percenty of width) - diameter.
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Old 01-14-2013, 10:55 AM   #6873
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Originally Posted by Seth S View Post
same brand of tires? I have since differences in heights between brands. should be width/(height as percenty of width) - diameter.
It's amazing the discrepancy in sizes between brands.
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Old 01-14-2013, 10:59 AM   #6874
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Quote:
Originally Posted by crankshaft View Post
R U sure? I have a 100/100 rear and the sidewall is really short.
The 100/80 has a taller sidewall.
I found this. http://www.ehow.com/how_4841621_dete...tire-size.html
It seems a 120/100 would be 120mm tall and a 140/80 would be 112mm tall.
I guess the 140/80 would shorter.
I guess I could go for 100/100. That would surely give clearance.
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Old 01-14-2013, 11:01 AM   #6875
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Originally Posted by motoged View Post
...
And , yes, the EXC swingarms can take in water and it is a good idea to drill a 1/8 hole in the bottom of each swing arm a few inches from the back end....and check the holes occasionally as they can get plugged.
What about the 690 swingarm?
I know we drill 950/990 swingarms too.
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Old 01-14-2013, 11:06 AM   #6876
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Originally Posted by dad2bike View Post
What about the 690 swingarm?
I know we drill 950/990 swingarms too.

The 690 arm has some opennings in it as I recall...which makes me remember that I might have some stuff hidden in mine...hmmm better go have a look. I do recommend pulling out the adjuster bolts and coating them with copper anti-seize
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Old 01-14-2013, 12:38 PM   #6877
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I do recommend pulling out the adjuster bolts and coating them with copper anti-seize
Oh heck yeah. I do that to all my swingarms. I learned my lesson way back on a 1980 Husky swingswing arm.
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Old 01-14-2013, 12:48 PM   #6878
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I run Michelin T63's on my knobby wheels. The rear is 130/80. Works well and they are cheap.
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Old 01-14-2013, 01:08 PM   #6879
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Originally Posted by dad2bike View Post
I found this. http://www.ehow.com/how_4841621_dete...tire-size.html
It seems a 120/100 would be 120mm tall and a 140/80 would be 112mm tall.
I guess the 140/80 would shorter.
I guess I could go for 100/100. That would surely give clearance.
Yes your are correst. The first number is the width and the second number is the height expressed as an aspect ratio of the width.

90/90/21 says the width is 90 and the height is 90% of the width.

At least that is what the tire section of motorcycle-superstore.com says.
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Old 01-14-2013, 01:36 PM   #6880
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Originally Posted by dad2bike View Post
I found this. http://www.ehow.com/how_4841621_dete...tire-size.html
It seems a 120/100 would be 120mm tall and a 140/80 would be 112mm tall.
I guess the 140/80 would shorter.
I guess I could go for 100/100. That would surely give clearance.
The size 120/100 gives the width (120 mm) and height (120) as a percentage (100%) of the width. On a 140/80, the height would be 80% of 140 or 112. Changing tire aspect ratios can alter speed/distance measurements particularly if the change is on the wheel used for measurements.
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Old 01-14-2013, 04:08 PM   #6881
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...
Have you fixed your 690 or it is still suffering leaks ???

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Old 01-14-2013, 05:32 PM   #6882
Seth S
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Have you fixed your 690 or it is still suffering leaks ???

Paul Jr 8
Have not touched it or ridden in 9 months....other than to drain the coolant out of it. Had 3 decent crashes last year and needed a reset. I have done 10 years of ride and not much else so a little breather. Bike will get torn down and reiterated this spring.
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Old 01-14-2013, 06:14 PM   #6883
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Originally Posted by crankshaft View Post
R U sure?

Yep....and the technically adept guys even agree.....

But you can think whatever you want
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Old 01-14-2013, 06:59 PM   #6884
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Originally Posted by crankshaft View Post
R U sure? I have a 100/100 rear and the sidewall is really short. The 100/80 has a taller sidewall.
Positve.

100/80 means 100 mm wide x 100*80/100 = 80 mm heigth As you can read in the link, it's the aspect ration, and it is exactly the same principle with car and truck tyres.

The lower the aspect ratio, the sportier it is. Typicaly, sport car tyres have aspect ratio in the area of 30 to 40.

That said, the end result is not always in sync with the reality. Dunlop D606 130/90-18 are as wide as Pirelli MT21 140/80-18, and as tall as well ... It's not an accurate science ...

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Old 01-16-2013, 11:51 AM   #6885
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Anyone know if we can swap out the 2012 instrument cluster for an older digital one?

I already have white dust in my 2012 one as well as LCD issues with parts of it blanking out...

Cheers..

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