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

What size carb are U using on your 500

Discussion in 'Vintage/Left Kickers' started by ruwfo, Oct 14, 2009.

  1. ruwfo Administrator

    Location:
    NJ
    Husqvarna Motorcycle:
    1980 390CR, 1982 430CR, 1984 400WR
    Other Motorcycles:
    1985 250XC, 2016 FJ-09
    I'm just finishing putting a new top end on my 84 500CR, and after talking with Rick Horvat, i'm thinking of going back to the 38mm Mukini
    the bike had on it , instead of the 40mm.

    He said the 38 will make it start easier, & has some jetting info his said
    he'd dig up for me.

    What's every one here running: 38mm or stock 40 or 44 :eek:

    John
    ruwfo, Oct 14, 2009
    #1

  2. bultokid Husqvarna
    AA Class

    Location:
    Houston, Tx
    Husqvarna Motorcycle:
    '84 250/500 '87 250/430 '18TC250
    Other Motorcycles:
    Bultaco, Fantic
    I've got a 40 on the 82.5 and I am putting a 38 on my '83 500CR. LeftCoast has all the jetting info and set-up stuff in a article in Husky Club Newsletter #32
    bultokid, Oct 15, 2009
    #2

  3. Husq.fleet Husqvarna
    AA Class

    Location:
    Pendleton Oregon
    I'm very interested in the carb modifications. I have two 500's, 83-XC500 and a 84 WR-500. Easier starting would be a plus and power wise? they will never be ridden to their full potental. I'm unable to find the #32 issue on the list on this site.
    Husq.fleet, Oct 15, 2009
    #3

  4. ruwfo Administrator

    Location:
    NJ
    Husqvarna Motorcycle:
    1980 390CR, 1982 430CR, 1984 400WR
    Other Motorcycles:
    1985 250XC, 2016 FJ-09
    Here's info from #32 newsletter

    Here's the info from Husky newsletter #32 on the 82.5 500CR of
    Allen McKay

    Allen's bike had metal removed from the combustion dome to lower compression & make it easier to start. (doesn't say where or how much though?!)

    Other mod's are a 38mm carb Manifold (off a 250 and pushed the carb bell back too far back) was milled 6mm.

    He's settings for Sea level:
    380 Main Jet , 3.0 Slide , 6Dh3 Needle with clip in #1 position,
    P-2 needle Jet, 35 Pilot jet, NO air jet, 50/50 VP & pump gas
    with Spectro 50:1.

    Note it says he's running the stock pipe with a larger aftermarket silencer ,PVL ignition & polished reed assy too.

    The Stock Husky setting for the 1984 500CR (from MXaction) with 40mm are as follows:
    360 Main Jet, AA5 needle jet, 7DH3 Jet needle & 35 pilot
    ruwfo, Oct 16, 2009
    #4

  5. Husq.fleet Husqvarna
    AA Class

    Location:
    Pendleton Oregon
    Thanks alot, I'll print that out and put it with my manuals.
    Husq.fleet, Oct 16, 2009
    #5

  6. hawaii-rider Husqvarna
    AA Class

    Location:
    Graham Washington, Fort Moose
    Husqvarna Motorcycle:
    2018 TC250, 2015 TE300
    Other Motorcycles:
    04 CRF-270x, 95 CR500, 93 CR250 etc
    You can save your $$$$ on a new carb

    I am running the stock 40 on my 83 XC 500

    I did build my own intake blade system to increase throttle velocity and hopefully ease starting.

    it did that and more.

    She lights right up and the throttle response is almost too quick, still very smooth, but she builds revs much faster than before, starts easy (start it with my left boot on the bike if it has been started that day)
    and pulls hard and fast and it was about 150 cheaper than a new 38mm

    YMMV

    HR
    hawaii-rider, Oct 17, 2009
    #6

  7. john_c Husqvarna
    C Class

    Location:
    England
    Hi,

    As far as I remember 38 was the better option when they were new.

    John
    john_c, Oct 21, 2009
    #7