1. Husqvarna Motorcycles Made In Sweden - About 1988 and older

It starts! But how to tune?

Discussion in 'Vintage/Left Kickers' started by erickz, May 7, 2024.

  1. erickz Husqvarna
    A Class

    Location:
    Columbus, Ohio
    Husqvarna Motorcycle:
    1970 250 Cross
    Other Motorcycles:
    Penton 400 Mint, Ossa 250, Yam 250
    Got my 1971 250 to start…but when you crack the throttle it bogs…won’t accelerate as it should.
    so is it an ignition timing problem? Bike starts easily. Carb jetting issue? Suggestions would be appreciated. Thanks. EZ IMG_0674.jpeg
    erickz, May 7, 2024
    #1

  2. erickz Husqvarna
    A Class

    Location:
    Columbus, Ohio
    Husqvarna Motorcycle:
    1970 250 Cross
    Other Motorcycles:
    Penton 400 Mint, Ossa 250, Yam 250
    Maybe because it’s upside down….
    erickz, May 7, 2024
    #2
    mysery1 and Bill502 like this.

  3. flyingbob Administrator

    Location:
    USA
    Husqvarna Motorcycle:
    01&02WR360_02WR250_02CR250_12WB165
    Other Motorcycles:
    01 VOR400_07 TM450_22 GG250_07 Tuono
    Take the air filter out and see what happens.
    flyingbob, May 9, 2024
    #3

  4. Crashaholic Husqvarna
    Pro Class

    Location:
    Antelope Valley, CA.
    Husqvarna Motorcycle:
    73 450WR 6spd motor in a 75 MK frame
    Pilot jet is plugged. This jet is very small so its easy for debris to plug it. Also, its the jet that controls the idle and affects the first crack of the throttle. Cleaning can be as easy as clearing it with compressed air or as involved as soaking it in carb cleaner.

    If theres a problem with bogging after the RPM raises above idle then the main jet and/or needle jet most likely have debris in them.

    s-l1600 copy.jpg
    Crashaholic, May 9, 2024
    #4
    390wr Jon, Vinskord and DeathFromAbove like this.