LC4 Suspension options

Discussion in 'Thumpers' started by robdogg, Apr 22, 2005.

  1. robdogg

    robdogg turnip truck driver

    Jan 29, 2004
    wren-tonne, WA
    asked this over at KTMTalk but didn't get a lot of responses. I am hoping to beef up the springs on my 02 Adventure both front and back. Specifically I am hoping to hear from others about what rate springs they went with.

    I am around 280 in street clothes and will be loading the bike down (even further ;) for a 1500 mile ride here in about a month and a half so trying to keep from killing the ol girl.

    I emaild Race Tech; I have used their products before on other bikes but they said the don't carry what I need for the LC4. I'm also talking to a local suspension shop but he has not done a lot of 640's either so he suggested I try and get some feedback from others that have done this. C'mon, I know all of ya can't be running stock springs and I know I aint the only fatty (not naming names) riding a katoom 640
  2. txrider

    txrider Been here awhile

    Mar 14, 2005
    The great state of Texas
    Might not hurt to talk to the WP folks.
  3. BlitzBike

    BlitzBike LC4 Pilot

    May 6, 2004
    Ft. Lauderdale, FL near Alligator Alley
    I'm with ya on this. I've dropped some weight so I am down to 280 LBs and have about another 90 pounds in panniers to carry. Stock shock is a 7.0 but the WP appearantly go up to 9.0 but, I'm not sure what weight rating that is.(stock is 165Lb rider!!)
    Its tuff being a big guy in a small mans world. People above 6'2" make up less than 2% of the population. Let me know what you find out and I'll do the same.
  4. Jan from Finland

    Jan from Finland Been here awhile

    May 2, 2005
    Sommer-KTM (Europe's biggest KTM dealer) recommends these spring rates at for the fork:

    3.8 N/mm Ideal for light off-road rider weighting less than 55kg/123lbs
    (Standard set-up in EXC 125/200)

    4.0 N/mm For rider weighting less than 75kg/167lbs (EXC 250/300)

    4.2 N/mm EXC 4 strokes, LC4 640 Enduro, SXC 625, SX 125

    4.4 N/mm For SX with EXC model or for off-road rider over 95kg/211 lbs
    (SX 250, LC4 Adventure -2004, Super Moto 2004)

    4.6 N/mm For touring with bags, riding with passenger or for supermoto
    (LC4 Adventure 640 2005, SM 625/640/660 2005)

    4.8 N/mm Lot of luggage or Super Moto on streets (950, Rallye Replica 660)

    5.0 N/mm Super Moto Sport (SM 640 2002/2003, SMC 660 2003)

    I went for 4.8, but I can't comment how they work. Springs have just arrived and are not yet installed.

    About the shock they say:

    50/260 For light or small rider.
    56/260 LC4 1993-
    60/260 Competition 1994
    63/260 SXC 635 2005
    66/260 LC4 Enduro 2005
    70/260 Supermoto 2005, Adventure 640 1997-2005
    75/260 Rallye Dakar, Supermoto 2004
    80/260 Lot of luggage.

    At the back I still have the original 70/260. I may change that later, but I am not sure.
  5. MotoMike

    MotoMike Washed Up Desert Racer For The 2nd Time

    Sep 21, 2004
    SW Colorado
    Try talking to George at ESP in La Crescenta, CA. (818)951-9144. He did my 640 ADV and I am very pleased. He ordered a special spring (rear) and had to machine a spacer for it to work. I am 225lbs, but I am also a former desert racer and ride my 640 like it's a 525. He did wonders for it!