Anyone know the dimensions of the FZ6-S (04-06) Fork Spacer?

[Grahamm]

[quote author=Grahamm link=topic=26374.msg318445#msg318445 date=1595934473]
Perhaps I should clarify: I'm not going to be using the PVC permanently  :eek

It could crack/collapse the fist time you hit a bump or brake and riding around like a little old lady isn't going to give you the feed back you need, but hay it's your life mate, but have a thought for others. [/quote]


I don't think you've quite understood what I was saying.


The PVC pipe and washers are *literally* only for getting the spacer length right. Then I get the right length *metal* spacer :thumbup

That's why you need the correct weighted spring for your weight, to give you the right sag. 

The point is that the progressive spring is already being compressed somewhat by the spacer, which is why the sag is out.


By shortening the spacer, fewer of the spring coils are being squeezed down, thus giving more sag.

  Many owners/riders have their bikes set way too hard dampening wise, also what's going on at the back end has a big effect to what's happening at the front. 

See my other post about about setting the sag on the YSS shock

Hyperpro supply 15W fork oil with the springs, but that will, of course, only affect the damping, so I'll wait until I've got the preload right before I start playing with that.

Hyperpro supply a spring which is normally 10- 20% higher than standard, if that spring weight is more than your weight requires, no matter how much you cut off, it wont effect the strength, only it's travel over a given distance.  If the spring is progressive an you cut the wrong end off it will in a dramatic way.

Who said anything about cutting down the spring? I'm talking about shortening the spacer which compresses the spring.

Also if you in/decrease the spring you alter the rake which again effects the handling. 

Yes, I know. The YSS rear shock has +/- 5mm adjustment if I want to tweak the turn-in rate.

Of course I can always raise the forks if necessary.

Also, of course, if I get too much dive, I can adjust the air gap, but that's the last stage.

No, dive is or high speed damping is controlled by the shim pack

There is no shim pack on the FZ6 forks.

not the air gap, by reducing the air gap all you're doing is slightly increasing spring pre load, which in your case is too high already. 

Err, as far as I'm aware, the air gap above the oil level has nothing to do with the preload!


To directly quote a guy from Hyperpro:

The oil level determines how much the fork goes "in" when you brake hard. So changing the oil level, does nothing when riding normal.


The oil thickness determines how much damping you have in the fork. More or less weight will not change the amount of damping you need.


What does help, is to reduce the spring preload: since we use progressive springs, they have a softer and harder area.


By reducing the preload , the spring will work in a softer area, giving more comfort.


There is a spacer on top of the spring. If you cut off say 10mm, the spring should be in the right range and will give you the ride you want.

Instead of cutting the original ones, making a set of new ones is often easier (since the material is quite thin, it is hard to saw or cut)

The new one may be made from steel, aluminium or PVC.

Often swer pipe (for instance) has the proper outer diameter and is quite cheap and easy to cut

As I said above it's your life, you may get away with all of it, but if you don't someone could well have to come a clear you off the road.  Even if you do get away with it, you won't get a good set up, but it's all up to you.   

I'm quite willing to take advice if it benefits me, but what you're saying appears to be contradicting what I've had from Hyperpro themselves or watching eg Dave Moss's videos.