TC 570 Keihin FCR 41 MX jetting

Discussion in 'Older Single cams' started by Erik488, Jun 26, 2011.

  1. Erik488 Husqvarna
    AA Class

    Location:
    Sweden
    Husqvarna Motorcycle:
    TC 570,610 CR 500, 430,400,400,250
    Other Motorcycles:
    Monark-Jawa 350 1963 Swedish Army
    I have dropped my Dellorto in favor of a Keihin carb, tried the settings from a SMR 630.
    Pilot 55
    Needle QBVDR
    Main 180
    Having some problems with rough running in low rpm, tried pilots from 45,50,55
    45 and 50 some popping on deacceleration, with 55 the bike gets really hard to start even with hotstart when warm. Sparkplug is black but not wet.
    Anyone else out there who has a Keihin equipped TC with tips on jetting.
    //Erik
  2. RLW Husqvarna
    AA Class

    Location:
    Boise, Idaho
    About all I can do is give some reference info base on my current set-up on '05 TE510 with FCR41MX:
    Elevation: mostly 4000-6500ft
    Temps: 50-90 F

    Main: 180
    Needle: OBDVR 3rd clip
    Pilot: 45
    Leak Jet: 45
    Accel Pump adjust at 2.40mm
    Fuel Screw: Kouba Link, brass T-handle at approx 2 turns out

    Also now have a PowerNow intake bell which seems to help flame out pop-die stalls I've always had.
  3. uranys Husqvarna
    AA Class

    Location:
    Pittsburgh, Pa
    Husqvarna Motorcycle:
    00 wr360/02 wr360/09 wr125/09 wr250
    Other Motorcycles:
    96 xr600r
    I've been considering doing this as well. How hard was it to fit up?