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07 six days FE450 spring rates

D

Danger

Joined Jan 2007
17 Posts | 0+
Hi guys

Looking for some info on an 07 FE450 regarding the stock spring rates as info seems hard to track down for these bikes.
What fork springs does it have?
What shock spring does it have?

What rates are people using in the 85kg (187lbs) range.
This is for a top level 1x National Enduro and 3x National GNCC champion.

Would appreciate any comments or any guidance to a starting point. Off course we will be testing to determine what works best for us, but would like a bit of info before hand instead of starting blind.

We don't have many of these bikes here but they are starting to be pushed more into the fore front.

I have yet to work on one, but will be doing so in the next few weeks as we attempt to get it set up correctly for the new Enduro season.

Cheers

Greg
 

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Hi Danger
I never heard of a six days model or do you mean that it was used in the six days?
stock 07 comes with 44 springs in the front and a 84-250 in the back
personally I run a custom progressive in the back thats little softer to start but is
stiffer than stock WP spring as it gets into the travel that gives the back some bottoming
resistance in the big whoops and plush in the rocks rebound is not altered too badly
3clicks in or so and the bike was balanced

so long VIKING
 
Danger said:
Hi guys

This is for a top level 1x National Enduro and 3x National GNCC champion.
Click to expand...

Now that puts a smile on my face!! :D :D

Greg,

Make sure you send a PM to Fryguy. He has been hands on with ISDE Husabergs for years as well as the WEC factory Husabergs of Carlsson, Ljunggren, etc (although I know WP would not discuss the internals of the WEC bikes...we asked :roll: )

He should be able to give you solid input and chase down any other info you might need.

Cheers
 
RE: Re: 07 six days FE450 spring rates

Viking has the std spring rates spot on for you. let me know if I can assist.

For that level of rider I'd suggest the next stiffest front and rear. However testing will prove that, depending on your location and riding style, of course.


fry
 
RE: Re: 07 six days FE450 spring rates

hello greg and welcome to UHE.

agree with viking about progressive rear being better, especially on landing any deep hits. i'm a good clubman over here in the UK (195 pounds plus gear) and run 48s front and PDS4 rear (85/111). i think it's a tiny bit soft for me but for you might be good. recommend the progressive: PDS8. it should do it, it's a 81/99.

on the front, your 44s IMHO are a toss up with 46s. i reckon 46s.

please read "the doc" and go into suspension/handling/front forks/rear shock.

viking has an extensive background in suspension and does a lot of work with NOST (though he never pushes it here) whilst KTMs (who use the same WP gear) like MxT gear quite a lot.

i hope you'll join in the threads and when you learn something valuable that we don't - please pass it on!

regards

Taffy
 
Thanks for your help guys, now I'm not starting completely in the dark. By the way, is the shock the same as the KTM WP shock? I know the forks are the same. I'm familiar with both.

The bike is a Six Days model, not sure exactly what the difference is other than an aluminium tank. I will ask the rider next time we talk. Its possible valving could be different in the forks, but thats neither here nor there for us. The rider is sponsored by Husaberg and he also has a practice bike. It was his practice bike that was given to the over seas rider that had his Husaberg stolen days before the Six Day.

I am interested in trying a progressive spring on this bike too. I'm a fan of these on the KTM's but a little unsure of the different characteristics of the shock with the different pivot points on the Husaberg. I've only seen this bike in the back of the riders van up close, and seen a few here and there but have yet to have a close look at one.

I was also considering using a Telescopic needle, but again unsure if the different pivot points make this neccessary. These work great in the KTM's.

Hi Taffy, think you posted just before me.
 
Danger
KTM shock and the Husaberg are not the same what works for KTM does not necessarily
work for Husaberg, it is easier to have desent Husaberg shock compered to KTM
the shaft speed on Husaberg is faster than the KTM maybe thats why KTM change
their shock geometry for 07 I agree with Fryguy that a faster A/pro rider would benefit
with stiffer front springs

so long VIKING
 
Yes I am from NZ.

I'm thinking the 46's with some internal changes and perhaps a PDS7 for a start on the rear without any internal changes until we see what the shock performs like with the spring change, then adjust from there. Still a bit unsure how the rear spring rates are effected on the Husaberg in comparison to the KTM. Have a PDS8 here as well. How quick is it to get the shock out of the Husaberg? Its a couple of minutes on the KTM. Does the subframe have to come off?
 
i am 90 kg and found the . 48 springs to be very good .

the riding area was infested with rocks , tree roots , and square edged potholes .

just riding at a medium pace .

i think the gold valves helped as well .
 
Danger said:
Yes I am from NZ.

I'm thinking the 46's with some internal changes and perhaps a PDS7 for a start on the rear without any internal changes until we see what the shock performs like with the spring change, then adjust from there. Still a bit unsure how the rear spring rates are effected on the Husaberg in comparison to the KTM. Have a PDS8 here as well. How quick is it to get the shock out of the Husaberg? Its a couple of minutes on the KTM. Does the subframe have to come off?
Click to expand...

The subframe won't come off without a hacksaw. 8O It's all one piece. The shock is easy to remove, although I don't know if it will come out without removing the rear wheel, like a KTM will. I've always taken off the rear wheel so I have plenty of room.

You were asking about the springs relative to the KTM. The main thing I have found is that the Husaberg does not require as much spring as a KTM. Try the PDS 7, I think it will work. It all depends on your sag numbers and your personal preference. For reference, I'm using a progressive (aftermarket) 9/11.5 on the rear with .46 in the front. I go 230 lb geared up. I prefer the feel of the progressive spring myself, for the same reasons stated by Viking.
 
danger00! (surely?)

as john says, shock out but i i use a prise bar, rear wheel in no problemo.

i think you'll end up with the PDS8 or a 4.

go into forums, go into suspension and handling. lots there. a long thread in detail called fork setting for enduros.

one member has changed the resevoir - details can be found on the doc (or at least there's a link there).

regards

Taffy
 
Ha ha, thats right, forgot about the subframe! Still good that we can pull it in a couple of minutes.
Its a shame the chain runs right under the resorvair eh?
 
the chain doesn't touch resevoir. i don't know how close it gets. was going to experiment by making a 'cap' for a race and see how close it comes. even polestyrene would do.

secondly, the resevoir is off centre compared to the chain. the res is more inboard.

apparently WER make a resevoir bladder that may be usable offcentre. is this what you were thinking of? :wink
 
Well we tried the PDS7 and the best figures we could get were about 40/100 and this is with only a couple of mm of preload. I was hoping for 35/105.
We are going to use this spring for the Auckland MX Champs next weekend but then we might fit a PDS6 just to see what sag figures we end up with. I think the PDS6 will be too light for the .46 springs. The PDS7 spring felt good though at a MX test session on Saturday with just a little too much HS damping as was expected. The bike was well balanced with the .46 fork springs and the forks worked well.
Unfortunatley the track we were going to test on was closed due to fire risk and the test track we used did have some big jumps but the rest of the track was relatively smooth. We had a small test on some rougher ground on another property but were told we were not supposed to be using that so we had to cut that test short. The bike seemed stable and plush.
We are going testing again Wednesday at another well used MX track. No off road testing done yet as the MX is coming up first.
The resorvair already has a gouge in it from the chain striking it so we will not be risking a bladder. Even though it is off set slightly I just don't think it is worth the risk.
 
I have a bladder kit installed . Even though it looks like an additional upper chain guide I have yet to rupture it. Main usage MX and SX.
 
Hi Danger
I don't see any benefit in converting the shock too a bladder style res.
a loose chain and the valve is knocked off the only reason for installing a bladder is
that the shock is more plush in a high speed impact and it is only marginally better
which makes seal head lift a bigger problem greater results can be had modifying
the high speed part of the comp. shim stack with the benefit of less chance of
seal head lift

so long VIKING
 
Viking you please explain this problem of seal head lift? I have not heard of this problem before. I think I can understand what you might be talking about but can only imagine it happening under low N2 pressures.
 
Danger
I assume that you had a shock disassembled then you would now that the seal head
is held in place by a snap ring and there is no seat for the seal head
in theory the only fluid that is to be moved into the res. is the volume displaced by the shock shaft of course it is also there for thermal expansion now if you have a high speed movement of shock shaft and the comp adjusted light (light setting) the pressure
release is lighter on the comp adj. than the that of the comp stack the path of least resistance is for the fluid move into res. when that happens
a vacuum is created on the rebound side of piston causing seal head lift away from
snap ring result bad rebound and if this happens enough o ring on seal head starts
to leak
the reason for a bladder to feel pusher in this scenario is that has more surface area
compared to stock piston
hopefully this makes sense to you I know it is heavy duty

VIKING
 

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