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Which fork oil?

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andrew
Mister Road Rage



Joined: 03 Feb 2002
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PostPosted: 17:09 - 07 Apr 2006    Post subject: Which fork oil? Reply with quote

Does anyone know what fork oil i need for a honda firestorm? I was about to order some from ebay but don't want to get the wrong stuff.

Thanks in advance.
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instigator
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Joined: 19 Oct 2004
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PostPosted: 17:12 - 07 Apr 2006    Post subject: Reply with quote

If memory serves me right, it uses 10W Fork Oil.

Never changed my fork oil on the storm but was going to and checked up on it.

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andrew
Mister Road Rage



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PostPosted: 17:21 - 07 Apr 2006    Post subject: Reply with quote

Cool so if i wanted to stiffen the suspension a bit would i go for a 7.5w or go higher and have 15w??
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instigator
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PostPosted: 18:46 - 07 Apr 2006    Post subject: Reply with quote

It's my understanding that the thicker the stuff(15w), the harder it will get (not by a huge amount in my experience but the next best thig to changing the fork springs)

I googled about and noticed racers playing about with aftermarket springs (wp) and fork oil if 7.5 and 5w grades. No idea why they'd do that.

https://www.roadracers.co.uk/vtr.htm

I quote:

Quote:
Once I started fiddling, I thought I’d take it further. Suspension mods were the first to appear, (please bear in mind that my budget was small for this project, so you’ll see no references made to Ohlins, Akrapovic etc. that is considered the best by those in the know, but rest assured you can do just as good for less). First the forks were dropped 10mm and the fork oil changed to 15wt and the air gap increased to 140mm. This aided steering and feel from the spindly 41 mm forks. Next was an EMC Endurance rear shock, 5mm longer than standard on the damper rod, a spring to suit my weight and with loads more preload and rebound damping...perfect !! The bike now went round corners and handled generally a lot better apart from a rather vague feeling from the front when above 140 mph, but to be fair that wasn’t often. Various mild steel nuts and fittings were exchanged for titanium and alloy, which in total did shed about 5 to 6 kgs off the dry weight and boy it did notice on the road too. Much more responsive to rider input.
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andrew
Mister Road Rage



Joined: 03 Feb 2002
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PostPosted: 00:47 - 08 Apr 2006    Post subject: Reply with quote

instigator wrote:
It's my understanding that the thicker the stuff(15w), the harder it will get (not by a huge amount in my experience but the next best thig to changing the fork springs)

I googled about and noticed racers playing about with aftermarket springs (wp) and fork oil if 7.5 and 5w grades. No idea why they'd do that.

https://www.roadracers.co.uk/vtr.htm

I quote:

Quote:
Once I started fiddling, I thought I’d take it further. Suspension mods were the first to appear, (please bear in mind that my budget was small for this project, so you’ll see no references made to Ohlins, Akrapovic etc. that is considered the best by those in the know, but rest assured you can do just as good for less). First the forks were dropped 10mm and the fork oil changed to 15wt and the air gap increased to 140mm. This aided steering and feel from the spindly 41 mm forks. Next was an EMC Endurance rear shock, 5mm longer than standard on the damper rod, a spring to suit my weight and with loads more preload and rebound damping...perfect !! The bike now went round corners and handled generally a lot better apart from a rather vague feeling from the front when above 140 mph, but to be fair that wasn’t often. Various mild steel nuts and fittings were exchanged for titanium and alloy, which in total did shed about 5 to 6 kgs off the dry weight and boy it did notice on the road too. Much more responsive to rider input.


Intresting stuff, thanks for digging that out.
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