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From: The Older Gentleman on 24 Mar 2007 04:23
Potage St. Germaine <flying_booger(a)yahoo.com> wrote:

> But he doesn't *know* what the correct level or volume of oil
> should be, so your suggestions are useless, as is TOG's idea
> that he should scratch a line on the inside of the shock body,
> because the OP doesn't know how much oil has wept out of the
> the shock over years of the rod stroking in and out of the seal.

Except he says they aren't leaking, duh.

The amount of oil lost by the rod going in and out of the seal will be
so small as to be immeasurable.

>How much oil would a shock like that need? I would think that filling
>the shock until the oil was up to the top of the inner cylinder would
>be work just fine.

In other words, guess. Not a good call.

--
BMW K1100LT 750SS CB400F CD250 Z650
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
From: Rick Cortese on 24 Mar 2007 14:32
Eric wrote:
> On Mar 23, 12:48 pm, chateau.mur...(a)btinternet.com,
> <chateau.mur...(a)btinternet.com> wrote:
>
>>On 23 Mar, 17:32, "Eric" <eric.gofo...(a)gmail.com> wrote:
>>
>>
>>
>>
>>>Hello,
>>
>>>I put some old steel-bodied winged logo Koni shocks that I got at a
>>>swap meet on my Norton Commando. They were a big improvement on my
>>>worn out NJB's, but they're still a bit mushy I'm thinking they could
>>>use a change in oil. Good news is that they don't appear to leak at
>>>all.
>>
>>>I asked someone at IKON about getting parts for them, they said that
>>>the design of Koni shock they were reproducing were a bit later, so
>>>they couldn't supply seals, etc. They recommended using 5 wt oil, but
>>>didn't say how much. It looks like I could probably just take the
>>>springs off the shocks unscrew the top of the shock body and change
>>>out the oil by turning the shock upside down and pumping it out.
>>
>>>Has anyone done this before? Not sure how much to add. I was
>>>thinking that I could measure the amount of oil that comes out of each
>>>shock and put in whichever has more in it, if they have different
>>>amounts, due to slight leakage over the years.
>>
>>It's quite commonly done. You really need a shock compressing tool, to
>>compress the spring so that you can remove the split collets that hold
>>it to the body. It is *exactly* like compressing a valve spring to
>>remove the collets on that. Only bigger.
>>
>>Measuring the oil will be difficult, because you always get some left
>>in the shock. Better to mark the oil level with a small scratch mark
>>on the inside and refill to that level.
>
>
> But how do I know how much oil to add? You mean look at where the oil
> level is , before I dump out the old oil?

Been a while since this thread started disintegrating but I will give it
a shot anyway.

As I recall you can over fill the shocks and just leave out the top seal
or leave it loose/non compressed/leaky. You just move the rod full
travel and the excess squirts out the top. I think it the amount you
need is only about 1/3 the shock volume but I really don't recall.

If you don't have enough oil, you will get resistance for only a partial
stroke and then it will just move like there is no dampening.
From: Potage St. Germaine on 24 Mar 2007 15:11
On Mar 24, 10:32�am, Rick Cortese <ricor...(a)earthlink.net> wrote:
> Eric wrote:
> > On Mar 23, 12:48 pm, chateau.mur...(a)btinternet.com,
> > <chateau.mur...(a)btinternet.com> wrote:
>
> >>On 23 Mar, 17:32, "Eric" <eric.gofo...(a)gmail.com> wrote:
>
> >>>Hello,
>
> >>>I put some old steel-bodied winged logo Koni shocks that I got at a
> >>>swap meet on my Norton Commando.  They were a big improvement on my
> >>>worn out NJB's, but they're still a bit mushy I'm thinking they could
> >>>use a change in oil.  Good news is that they don't appear to leak at
> >>>all.
>
> >>>I asked someone at IKON about getting parts for them, they said that
> >>>the design of Koni shock they were reproducing were a bit later, so
> >>>they couldn't supply seals, etc.  They recommended using 5 wt oil, but
> >>>didn't say how much.  It looks like I could probably just take the
> >>>springs off the shocks unscrew the top of the shock body and change
> >>>out the oil by turning the shock upside down and pumping it out.
>
> >>>Has anyone done this before?  Not sure how much to add.  I was
> >>>thinking that I could measure the amount of oil that comes out of each
> >>>shock and put in whichever has more in it, if they have different
> >>>amounts, due to slight leakage over the years.
>
> >>It's quite commonly done. You really need a shock compressing tool, to
> >>compress the spring so that you can remove the split collets that hold
> >>it to the body. It is *exactly* like compressing a valve spring to
> >>remove the collets on that. Only bigger.
>
> >>Measuring the oil will be difficult, because you always get some left
> >>in the shock. Better to mark the oil level with a small scratch mark
> >>on the inside and refill to that level.
>
> > But how do I know how much oil to add?  You mean look at where the oil
> > level is , before I dump out the old oil?
>
> Been a while since this thread started disintegrating but I will give it
> a shot anyway.
>
> As I recall you can over fill the shocks and just leave out the top seal
> or leave it loose/non compressed/leaky. You just move the rod full
> travel and the excess squirts out the top. I think it the amount you
> need is only about 1/3 the shock volume but I really don't recall.
>
> If you don't have enough oil, you will get resistance for only a partial
> stroke and then it will just move like there is no dampening.- Hide quoted text -
>
> - Show quoted text -


From: Potage St. Germaine on 24 Mar 2007 15:17
On Mar 24, 10:32?am, Rick Cortese <ricor...(a)earthlink.net> wrote:

> As I recall you can over fill the shocks and just leave out the top seal
> or leave it loose/non compressed/leaky. You just move the rod full
> travel and the excess squirts out the top. I think it the amount you
> need is only about 1/3 the shock volume but I really don't recall.

There has to be a significant air space over the fluid, or the air
spring effect builds up too rapidly.

There is .pdf file that has a cutaway drawing of an air over oil twin
cylinder shock at the Koni distributor's site, I think it's www.konia-na.com

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