Actually that’s a fabulously simple analogy. Well done.



_____

From: hondarc30ownersclub2@yahoogroups.com
[mailto:hondarc30ownersclub2@yahoogroups.com] On Behalf Of canuckrc30
Sent: Tuesday, 13 January 2009 4:12 AM
To: hondarc30ownersclub2@yahoogroups.com
Subject: [Honda RC30 Owner's Club ] Re: Forks - Compression Adjuster -
Preload Adjusters - Donor Springs Spacer



Not really a response to anyone but .... more windings, either by a
longer spring or a tighter helix makes a spring softer. The HRC
springs have more windings from being longer and also have a tighter
helix. On these particular springs the increased rate comes from the
larger wire diameter. Best way to vision a spring is to imagine it
uncoiled making it a torsion bar similar to the front of my old Chevy
4x4 (or the Dodge Valiant I drove in high school). Springs are just a
very convenient way of packaging a torsion bar.

Some info that might prove both boring to some, useful to others...

HRC Springs
Part No. 51403-NL0-821
37.8 mm OD
17.5 live windings
4.8 mm OD wire
265 mm long +/- (new springs)
Calculated spring rate 0.853 kg/mm (47.8 lb/inch)
Engraved/published spring rate K = 0.85 (They also made 0.80 and 0.90
I think)
Spacer length = 129.6 mm
Air gap = 98 mm

Standard Spring
Part No. 51401-MR7-003
37.8 mm OD
14.5 live windings
4.5 mm OD wire
246 mm long +/- (used springs)
calculated spring rate = 0.774 kg/mm (43.3 lb/inch)
No published spring rate (that I know of?)
Spacer Length = 150 mm
Air Gap = 98 mm

--- In hondarc30ownersclub <mailto:hondarc30ownersclub2%40yahoogroups.com>
2@yahoogroups.com, andrew edwards
<eddiethegun@...> wrote:
>
> I made the point so allowance can be made for the intrusion of
thicker walled spacers.
> Heavier diameter wire and more/closer wound coils of a non standard
spring can have a similar effect.
> Â Â Regards, Eddie.
>
> --- On Mon, 12/1/09, canuckrc30 <no_reply@yahoogroup
<mailto:no_reply%40yahoogroups.com> s.com> wrote:
>
>
> From: canuckrc30 <no_reply@yahoogroup <mailto:no_reply%40yahoogroups.com>
s.com>
> Subject: [Honda RC30 Owner's Club ] Re: Forks - Compression Adjuster
- Preload Adjusters - Donor Springs Spacer
> To: hondarc30ownersclub <mailto:hondarc30ownersclub2%40yahoogroups.com>
2@yahoogroups.com
> Received: Monday, 12 January, 2009, 2:48 PM
>
>
>
>
>
>
> 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.
> >
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Stay connected to the people that matter most with a smarter
inbox. Take a look http://au.docs.
<http://au.docs.yahoo.com/mail/smarterinbox> yahoo.com/mail/smarterinbox
>
> [Non-text portions of this message have been removed]
>




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