Sounds reasonable to me, Eddie.

Dave.





--- In hondarc30ownersclub2@yahoogroups.com, andrew edwards
<eddiethegun@...> wrote:
>
> Hi Dave.
>  As I said in all my posts, and you have suggested, adjustment
from standard height, or volume of oil must be made when any
component occupying a lesser or greater volume of space in the fork,
is placed in there.
>  Many people will play with heights and volumes in a standard
fork, knowing that it will change the volume of the air cavity above
the oil.  The reduction of the volume of this cavity by increasing
oil capacity or height can build in a significant änti-dive"effect
under brakes by causing the internal pressure in the fork to increase
more quickly per unit of axle travel as opposed to the greater volume
above the standard height or quantity of oil. Think compression
ratios in a cylinder and you`ll get the picture. It will not greatly
change the short stroke action of the fork. That is where oil weight
changes and damping adjustments come in. 
>  Doing the fork oil by height is the most accurate way of matching
fork oil fills, but again, the standard height goes out the window
when springs and spacers other than standard are used, because the
oil height is done with these removed.
>  Regards, Eddie.
>    
>
> --- On Mon, 12/1/09, Dave <arsey30@...> wrote:
>
>
> From: Dave <arsey30@...>
> Subject: [Honda RC30 Owner's Club ] Re: Forks - Compression
Adjuster - Preload Adjusters - Donor Springs Spacer
> To: hondarc30ownersclub2@yahoogroups.com
> Received: Monday, 12 January, 2009, 9:57 PM
>
>
>
>
>
>
>
> I have had fork seals leak on my RC and other bikes due to wear
over
> a mileage, [20,000], but grit or scratches on the chrome may have
> been the cause.
> I always use the standard oil level, my suggestion of reducing
> capacity was to make up for the new spacer volume.
>
> My point about road riding or racing was that whilst you can set a
> bike up for a 3 mile smooth circuit to get the best compromise, and
> notice a small change, a lot of the roads I ride in Surrey and
> Hampshire have a poor and variable surface, with holes, bumps, ruts
> and ridges, so it would be difficult to detect a small difference a
> few ccs of oil made, a bit like 1 click on the damper adjuster.
>
> When I said a few ccs, I was thinking that reducing the oil
capacity
> would mean measuring the oil by volume, which is less accurate than
> oil level / air gap.
>
> --- In hondarc30ownersclub 2@yahoogroups. com, canuckrc30
> <no_reply@ .> wrote:
> >
> > Funny you should ask. It can be hard on fork seals by causing
higher
> > pressures (sorta like a spring, but with less linearity) inside
the
> > fork. Maybe that's your leaky fork seal problem?
> >
> > If you fill your forks to 1/2 of the spec'd air gap in the manual
I
> > guarantee you will feel it on the bumpy stuff. It'll be a nasty
> bitch
> > wanting to shake you off like an 18 year old virgin. Trust me I
> know,
> > it's happened to me a few times. Now I'm married so I don't have
> that
> > problem anymore. My grip is better from riding motorcycles which
has
> > helped me a lot.
> >
> > I no longer race, and even then it was not on pavement. Not sure
> what
> > that has to do with setting fork oil levels though. I was number
346
> > and number 3 when I raced if memory serves correct.
> >
> >
> > --- In hondarc30ownersclub 2@yahoogroups. com, "Dave" <arsey30@>
> wrote:
> > >
> > > Then why not reduce the oil capacity by 31cc.
> > > Do you race, or just ride on the road, as you may not even
notice
> a
> > > small change in capacity, as I don't when a seal leaks.
> > >
> > >
> > > Dave.
> > >
> > >
> > >
> > >
> > >
> > >
> > > The man's point about the wall thickness is a good one. There
is
> 31cc
> > > of difference between the stock spacer and a same lengths NPS 1
> > > Schedule 40 PVC pipe. That is a significant amount of air gone
> missing.
> > >
> >
>
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