Welcome, Guest. Please Login or Register

Author Topic: 450X Suspension settings?  (Read 605 times)

0 Members and 1 Guest are viewing this topic.

Offline swart skaap

  • Deleted Users
  • Race Dog
  • *
  • Bike: AJS (all models)
    Location: Gauteng
  • Posts: 626
450X Suspension settings?
« on: March 23, 2013, 07:07:38 pm »
I weigh in @ 95kg with gear.
I recently changed the fork oil on my '07 450 with fresh 5W -310ml per fork leg.

With all setting at standard, the fork is way too harsh over corrugated road. I really have to grab on to the bars.

Are there any pointers you guys could give me, especially those who do long distance/rallye riding on X's?
Thanks!

-- Jou lekke ding! --
 

Offline Papwiel

  • Pack Dog
  • **
  • Bike: AJS (all models)
    Location: Free State
  • Posts: 243
  • PAPWIEL
Re: 450X Suspension settings?
« Reply #1 on: March 23, 2013, 07:21:51 pm »
Pressure release valves? Tyre pressure? I release the pressure in my forks regularly. My tyres are also 1 bar front and 0.8 rear. (I only weigh 68kg) and it works for me.
Or you can try to go FASTER over the corrigations :imaposer: :imaposer:
A married man should forget his mistakes. There's no use in two people remembering the same thing.
 

Offline swart skaap

  • Deleted Users
  • Race Dog
  • *
  • Bike: AJS (all models)
    Location: Gauteng
  • Posts: 626
Re: 450X Suspension settings?
« Reply #2 on: March 23, 2013, 07:34:24 pm »
Thanks, I'll check my pressures it sure can help but compared to my KTM 450, it will require more than just pressure relief.

-- Jou lekke ding! --
 

Offline superfoxi

  • Forum Vendor
  • Race Dog
  • ***
  • Bike: Honda XRV 750 Africa Twin
    Location: Western Cape
  • Posts: 3,045
  • Thanked: 61 times
  • Professional motorcycle and suspension services
Re: 450X Suspension settings?
« Reply #3 on: March 23, 2013, 08:25:08 pm »
There could be more than one reason for it.

- bad fork alignment because of wrong installation of front wheel. That is a mistake most people make and it has a HUGE effect on the internal friction of your forks. Check out this article by Hilton Hayward:

http://haywardsuspension.co.za/docs/0904-how-to-fit-your-front-wheel.pdf


- "dry" fork seals. Yo will be surprised what difference it makes when you regularly lube your fork seals...

http://haywardsuspension.co.za/docs/0903-seal-tuning.pdf


- wrong spring rate. At 95kg's you will have to get stiffer springs front and back. The stock spring rate is for riders around 75kg. That means that the suspension will "ride too low" in the progressive part of the travel - that will make the forks feel harsh (and not more comfortable as one might expect).

- old oil and worn fork seals and bushes.

You are welcome to send me a pm or call me if you have questions.
0788448830
 

Offline swart skaap

  • Deleted Users
  • Race Dog
  • *
  • Bike: AJS (all models)
    Location: Gauteng
  • Posts: 626
Re: 450X Suspension settings?
« Reply #4 on: March 23, 2013, 09:07:18 pm »
Thanks foxi!

-- Jou lekke ding! --
 

Offline swart skaap

  • Deleted Users
  • Race Dog
  • *
  • Bike: AJS (all models)
    Location: Gauteng
  • Posts: 626
Re: 450X Suspension settings?
« Reply #5 on: March 23, 2013, 10:02:42 pm »
Front wheel was mounted poorly it seems.
It seems like the non-disc fork leg sits ~2mm outwards on the axle now.

Will test it tomorrow
 :thumleft:

-- Jou lekke ding! --
 

Offline swart skaap

  • Deleted Users
  • Race Dog
  • *
  • Bike: AJS (all models)
    Location: Gauteng
  • Posts: 626
Re: 450X Suspension settings?
« Reply #6 on: March 24, 2013, 05:30:37 pm »
Thanks Foxi, it's sorted.
The fork's legs were sitting at an angle, resulting in excessive sticktion!

Refitting the wheel as per Hilton Hayward's instructions, solved it.
 :ricky:

-- Jou lekke ding! --
 

Offline superfoxi

  • Forum Vendor
  • Race Dog
  • ***
  • Bike: Honda XRV 750 Africa Twin
    Location: Western Cape
  • Posts: 3,045
  • Thanked: 61 times
  • Professional motorcycle and suspension services
Re: 450X Suspension settings?
« Reply #7 on: May 03, 2013, 06:48:31 pm »
 :thumleft: