1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

'04 TE450 running rough, backfiring

Discussion in '4 Stroke' started by Hoosq fan, Mar 30, 2013.

  1. Hoosq fan Husqvarna

    Husqvarna Motorcycle:
    2004 TE450
    Other Motorcycles:
    Yamaha TDM850
    Took carb apart including TPS off, put back together, starts ok but try to rev it and I get clouds of black smoke with backfiring out through the muffler as I open up the throttle. Could it be the throttle position sensor got altered? If so, how do you set it. What does it do anyway?
    Hoosq fan, Mar 30, 2013
    #1

  2. Coffee CH Owner

    Location:
    Between homes - in ft Wayne IN
    Husqvarna Motorcycle:
    2006 TE250, 2013 TR650 Terra - sold
    Great question... and I do not know the answer. Hopefully someone else will give their input.

    Welcome :cheers:
    Coffee, Mar 31, 2013
    #2

  3. Xcuvator Husqvarna
    Pro Class

    Location:
    Scholls Oregon
    Husqvarna Motorcycle:
    TE450,610 WB165,WR250 WR360 & XC430
    Other Motorcycles:
    yes
    The TPS retards the timing at low speed. I don't think that is your problem I have disconnected mine and couldn't tell much difference.
    Have you checked your valves lately?
    Xcuvator, Mar 31, 2013
    #3

  4. Soviet Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2004 TC 450
    Did this motor run correctly before you tore that carb apart? If the pilot circuit isn't perfectly clean your bike will run terribly, if at all...throwing flames out the exhaust, sputtering, won't idle etc. Is the choke system in tank? If you're carb is absolutely perfect and you know it, then its likely really tight valves.
    Soviet, Apr 1, 2013
    #4