Fork Springs for LC4 Adv.

Discussion in 'Thumpers' started by Doc_Busa, Jan 15, 2005.

  1. Doc_Busa

    Doc_Busa Been here awhile

    Sep 21, 2003
    Tucson, AZ
    I was wondering if you guys have any recommendations on fork springs for the KTM Adv? I put Eibach's in the my old LC4, and it was a HUGE improvement. Just curious if you have any thoughts on a set for hauling a 270 lb rider plus some gear?

    Thanks :thumb
  2. Buckster

    Buckster Banned

    Jul 23, 2004
    Atlanta GA or London UK
    Check your WP importer, they will give the correct spring rates, I would go for linear springs rather than progressive, otherwise you lose off road ability, also upgrade the rear spring to suit.
  3. Jerome

    Jerome Been here awhile

    Dec 23, 2001
    London, England
    I was offered the Dakar fork and rear springs to replace my originals which were shagged.

    I'm afraid i cant remember the specs for the front ones but the rear (have you sorted this already?) was a 260 / 75-95 progressive one so it's way harder than the standard 260/70 and might work for you.

    If it's any interest both are in Sao Paulo, Brazil at the KTM importer. Tel: +55-11-30826577. E-Mail:

    The owner, Waldyr, speaks fluent English and is very knowledgeable.
  4. Mack

    Mack Gone, but never forgotten. RIP, Mack...

    Sep 7, 2002
    Austin, Texas USA Native Oregonian
  5. Scoot Jockey

    Scoot Jockey BST Faithful

    Feb 16, 2004
    I weigh about 250lbs and switched last fall from the stock 4.4 WP springs to the 4.8 springs. I was a bit nervous in making this decision, in thinking that this spring rate may be too stiff, but it worked out great! It no longer feels like I am going over the handlebars when I make a quick stop, and still feels great doing 80+ mph over desert roads. I believe that 4.8 is the stock spring rate for the 950 and also the 660 rallye bikes. At 270lbs I would recommend doing the switch, and also swap out the rear spring to the 75/260 or 80/260. the preload then needs to be adjusted to within the specs stated in your WP booklets that came with your bike. When adjusting the preload on my front springs, I found that WP or KTM had more shims in one side than they did in the other, so one side had about 1/8" more preload! Not a huge deal, just kinda strange. With the new springs, I was able to adjust the preload on both front and rear, so that I am still within the adjustment range, whether it is just me riding, or me and 100 lbs of luggage. :D

    Scoot Jockey
  6. meat popsicle

    meat popsicle Ignostic

    Feb 9, 2004
    Circumlocution Office of Little Dorrit
    Couple of questions for y'all, if I am 200lbs, then standard gear should put me between there and 250; adventure gear should put me up around 300. What do I, when I have the money..., set for? It sounds like scoot jockey is fine with his springs over a 100lb range. I guess this is something that the shops will know.

    Also, Buckster, what's the problem with progressive springs off-road? It almost sounded like Jerome was given a Rallye spring which he said was progressive? :dunno

    Maybe there is a chart somewhere that shows what weight range would work with what shock/fork spring setups? I guess that would be bike dependant as well but we do have the front/rear weights for the LC4s around here somewhere.