Husaberg
Go Back   Husaberg Forum > Mechanical and Technical > Suspension

Suspension Suspension and Handling Forum - bouncy bouncy!


Reply
 
LinkBack Thread Tools Display Modes
April 3rd, 2005, 08:59 PM   #1
Senior Member
 
Joined: Oct 2002
From: Brooks, AB

Posts: 1,244
Thanks: 3

I Ride: 2017 FX 450, 2006 Fe 496 Factory
05 Fe450 suspension tuning

I rode my 450 today on my Hare scramble/grass track. To keep the front from diving when decelling, I installed 4.6 springs and ran the stk 80/250 spring in the back. After a few laps I softened the fork compression 4 clicks and the high speed on the shock by half a turn. It seems very good, but was a little harsh on braking bumps and chopy corners.

The track is hard pack clay, bentonite to be exact and can get blue groove, single track for about half of it, similar to the "Sovereign trail" in Moab, and flat wide off camber for the rest of the grass track. The grass track has a couple 2nd gear corners but mostly 3/4 gear.

I had dropped the fork all the way to the lowest line on the tube. It turns in on anything but it is a little dicey on downhill braking bumps.

After installing a 71-96/260 spring for experiment, I am in a quandry. The progressive spring really holds a line better, soaks up the chop better, but looses the back easier on fast sweepers, but does not drop into a rut without serious committment. If I couldget the best of both worlds....

I think there is more testing needed.

fry

btw rider weight approx 240 plus gear, 30 mm static sag, 112 mm race sag both springs
fryguy is offline  
 
April 4th, 2005, 06:51 AM   #2
Senior Member
 
Joined: Nov 2001
From: Ely, England

Posts: 15,853
Thanks: 475

I Ride: Husaberg FE501e 2003
i need .46 and i weigh 200lb's fella. so i'm wondering if you should have gone to .48s. lesmoto had a set for sale and i tried to get them so that they were at splat's upon arrival. sold already!

if you try the .48s and they work better i will have the .46s off you like a shot!

this 'tipping of the balance' may help you decide on that rear spring?

at present i have .44s with 1" spacers preloading them.

regards

Taffy
Taffy is offline  
April 4th, 2005, 08:55 AM   #3
ajt
Senior Member
 
ajt's Avatar
 
Joined: Sep 2004
From: Reno, NV

Posts: 163
Thanks: 0

I Ride:
Fry

The downhill braking bumps could be a compression issue... or even a rebound issue.

That is a PDS1 you are trying, I would think for your weight you would want atleast a PDS3.

Good luck!
ajt is offline  
April 4th, 2005, 09:16 PM   #4
Senior Member
 
Joined: Oct 2002
From: Brooks, AB

Posts: 1,244
Thanks: 3

I Ride: 2017 FX 450, 2006 Fe 496 Factory
I'm going to believe your fork rebound suggestion Ajt. As far as spring rates, in my 03 I run 4.8 and a 85/111 but the dampening has been stiffened considerably since then, some in 04 and more again this year. I'll give up what I learn next time I'm out.

thanks gents

fry
fryguy is offline  
April 4th, 2005, 09:31 PM   #5
ajt
Senior Member
 
ajt's Avatar
 
Joined: Sep 2004
From: Reno, NV

Posts: 163
Thanks: 0

I Ride:
Fryguy,

For what it is worth, I felt that the 05 Fe450 and Fe550 are suspended perfect in stock trim. But then again I am a puny 190lbs.
ajt is offline  
April 5th, 2005, 11:34 AM   #6
Senior Member
 
Joined: Oct 2002
From: Brooks, AB

Posts: 1,244
Thanks: 3

I Ride: 2017 FX 450, 2006 Fe 496 Factory
I thought so too, it cornered well etc, but once I rode more here at home, I found that on steep descents, the fork dived too much and I lost stability.
fryguy is offline  
April 5th, 2005, 02:55 PM   #7
Senior Member
 
Joined: Nov 2001
From: Ely, England

Posts: 15,853
Thanks: 475

I Ride: Husaberg FE501e 2003
lee

you are aware that the head angle has been steepened by 1.5 degrees? this will add 5% weight to the front of the bike so that if it was say 110lb front and 120lb rear it may now be equal.

then you add the weight of a lardy bugger like you up the front end and that's another 110/120 equaled out.

so this isn't perhaps a good time to go to an even softer spring. just a little extra thought.

BTW you can actually check this by putting first the front wheel and then the back wheel on a set of bathroom scales. keep the bike level with a 2" block of wood under the other end to the scales.

it's irrelevant what your two steeds weigh. IT'S THE RATIO OF THEIR WEIGHT!

when i road raced my ducati F2 pantah it started out weighing 430lbs. in the end i had it weighing less thean the factory bike at 268lbs.

however when i started, it was 42/58% front to rear and when i'd finished it was 55/45% front to rear.

husabutt is measuring it all up for me sometime as well.

regards

Taffy
Taffy is offline  
April 7th, 2005, 06:43 PM   #8
Member
 
Joined: Jan 2003
From: Marshallville, Ohio

Posts: 69
Thanks: 0

I Ride:
Suspension

We have found out tha progressive rate springs do not work more oil and some times just adding a tuch of heavery oil does the trick. When changing the high speed you have to also reajust the slow speed it is better to feel good on 75% of the track and may be not so good on the other 25% some times we do have to move our fat butts a little from back to front of the seat.
Cody is offline  
April 8th, 2005, 09:18 PM   #9
Senior Member
 
Joined: Oct 2002
From: Brooks, AB

Posts: 1,244
Thanks: 3

I Ride: 2017 FX 450, 2006 Fe 496 Factory
Thanks Cody

Yes a trade off is often made, I was hoping I might find the illustrius holy grail. The progressive to funky and the 80 is more predictable and the only real complaint with it is that is wasn't that comfy settling into a corner and would climb out, so maybe a little less sag or softer low speed.

My seat has a permanent dish in the front of the foam where my fat as sits and stays, its like velcro, who needs one of those stinkin' factory stepped seats!!!

Fry
fryguy is offline  
April 25th, 2005, 09:21 PM   #10
Senior Member
 
Joined: Oct 2002
From: Brooks, AB

Posts: 1,244
Thanks: 3

I Ride: 2017 FX 450, 2006 Fe 496 Factory
I have since softened the comp on the fork two more clicks and now tried the 84 spring.

Big difference. The progressive is too "boingy". THe 84 is sweet, the bike doesn't settle as much, turns in as it should, holds the line as it should and doesn't slide the back out on fast, flat sweepers.

Next the 88 to see if it is too stiff or..

fry
fryguy is offline  
Reply

  Husaberg Forum > Mechanical and Technical > Suspension

Tags
fe450, suspension, tuning



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fe450 suspension upgrade Shandog70 Suspension 2 March 30th, 2013 02:27 AM
Suspension Tuning Weekends, Snowy Mountains steve Suspension 15 October 24th, 2012 09:19 PM
Guide to basic suspension tuning dave186 Suspension 40 December 2nd, 2011 01:51 PM
suspension tuning Glenn141 Suspension 0 September 4th, 2010 06:34 AM
I AM NEW!!! Suspension Setup FE450 (09) scisneros Suspension 9 June 10th, 2009 02:20 AM


Facebook Twitter Google+ RSS Feed