Stock rear shock question

Artie
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Stock rear shock question

Post by Artie »

I believe it’s 13” eye to clevis if that’s correct what effect will going to 13 1/4” give me in terms of putting bike on center stand and handling
I generally ride these at a medium pace as we know their dinosaurs by todays standards and looking for a spring rate recommendation as well for cushy ride I weigh 189ilbs

daves79x
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Re: Stock rear shock question

Post by daves79x »

I think the stockers are 13.5 inches eye-to-eye.

Dave

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Re: Stock rear shock question

Post by NobleHops »

Stock springs will be perfect for you, Artie.
Nils Menten
Tucson, Arizona, USA '80 CBX, sort-of restored :-)

Artie
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Re: Stock rear shock question

Post by Artie »

And what rate are stock springs Nils?
I purchased Ikons few years back from you from my first presto CBX but can’t remember the rates but I know when people ask me about ride and handling I describe it similar to mid 60s Dodge dump truck ha ha
The resto I’m doing now would like something much more compliant
Eye to Clevis dimensions seem to be all over the place as well

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Re: Stock rear shock question

Post by EMS »

The CBX is a metric bike. Eye to Clevis should be measured and given in millimeters. When converted to "inches" the numbers end up all over the place. I recall it is 360mm. I have several original 79 and 80 rear shocks and will measure them and will correct myself or confirm that number.

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Re: Stock rear shock question

Post by EMS »

The uninstalled shocks measure: 1979-350mm, 1980-362mm

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Re: Stock rear shock question

Post by NobleHops »

The Ikon 7610-1413 measures 364 eye to clevis, and uses a progressive spring, 18/25/33 is the spring rate. More info on that is found in this thread, Artie:

http://www.cbxclub.com/forum/viewtopic.php?t=10739
Nils Menten
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Re: Stock rear shock question

Post by Artie »

Thanx Nils

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Re: Stock rear shock question

Post by jnnngs »

EMS wrote:
Thu Oct 06, 2022 10:52 am
The uninstalled shocks measure: 1979-350mm, 1980-362mm
I was intrigued that '79 and '80 would be different sizes. I just measured them both at 360mm.

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Re: Stock rear shock question

Post by EMS »

jnnngs wrote:
Sun Nov 27, 2022 9:12 am
EMS wrote:
Thu Oct 06, 2022 10:52 am
The uninstalled shocks measure: 1979-350mm, 1980-362mm
I was intrigued that '79 and '80 would be different sizes. I just measured them both at 360mm.
In Europe, the 79 and 80 (where sold) shocks were identical. The US and Canada had a simpler shock for the 79.
Besides, I think 2mm difference is within the tolerance of measuring and not worth the worry.

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Re: Stock rear shock question

Post by jnnngs »

EMS wrote:
Sun Nov 27, 2022 9:53 am
jnnngs wrote:
Sun Nov 27, 2022 9:12 am
EMS wrote:
Thu Oct 06, 2022 10:52 am
The uninstalled shocks measure: 1979-350mm, 1980-362mm
I was intrigued that '79 and '80 would be different sizes. I just measured them both at 360mm.
In Europe, the 79 and 80 (where sold) shocks were identical. The US and Canada had a simpler shock for the 79.
Besides, I think 2mm difference is within the tolerance of measuring and not worth the worry.
ah, maybe a typo then. You put 350mm for the '79.

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Re: Stock rear shock question

Post by EMS »

jnnngs wrote:
Sun Nov 27, 2022 10:12 am

ah, maybe a typo then. You put 350mm for the '79.
Paul, your typo comment prompted me to go back and look again at the shocks and what made me put up the numbers. I had to make sure the shocks were on the same damping setting. There is indeed a difference - smaller than I originally stated - between the two types. It is difficult to really assess what the "as new" conditions of a 40 year old used part actually was. Especially as the springs -like all springs - do set with age and use.
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Re: Stock rear shock question

Post by Rick Pope »

Do the springs or pre-load matter if you're measuring an un-mounted shock? Isn't it "topped out"?
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Re: Stock rear shock question

Post by EMS »

Rick: When you change the damping setting on an unmounted shock, you can clearly see the length changing.

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Re: Stock rear shock question

Post by Rick Pope »

But I didn't mention damping, nor was that addressed above. I asked about preload. What am I missing?
Rick Pope
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