LC4 Suspension options

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

  1. robdogg

    robdogg turnip truck driver

    Joined:
    Jan 29, 2004
    Oddometer:
    2,059
    Location:
    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
    #1
  2. txrider

    txrider Been here awhile

    Joined:
    Mar 14, 2005
    Oddometer:
    370
    Location:
    The great state of Texas
    Might not hurt to talk to the WP folks.
    #2
  3. BlitzBike

    BlitzBike LC4 Pilot

    Joined:
    May 6, 2004
    Oddometer:
    800
    Location:
    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.
    #3
  4. Jan from Finland

    Jan from Finland Been here awhile

    Joined:
    May 2, 2005
    Oddometer:
    621
    Sommer-KTM (Europe's biggest KTM dealer) recommends these spring rates at www.sommer-ktm.de 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.
    #4
  5. MotoMike

    MotoMike Washed Up Desert Racer

    Joined:
    Sep 21, 2004
    Oddometer:
    5,226
    Location:
    The Black Palm Springs
    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!
    #5