2004 sm 450 r not starting

Discussion in 'Super Moto' started by Luke eccles, Dec 31, 2016.

  1. Luke eccles Husqvarna

    Husqvarna Motorcycle:
    2004 SM 450R
    Other Motorcycles:
    Yamaha r6 5SL
    I have just put electric start back on my bike the engine is turning over and has a spark but wont fire it has back fierd a cuple of times can anyone give me somet to try
    Thanks
  2. jack topper Husqvarna
    AA Class

    Location:
    Cascade, MT
    Husqvarna Motorcycle:
    1974 400WR
    Other Motorcycles:
    honda, yamaha, suzuki, Indian, Kawas


    Luke, I've seen timing issues cause backfiring. Have you checked that?
    JT
  3. Luke eccles Husqvarna

    Husqvarna Motorcycle:
    2004 SM 450R
    Other Motorcycles:
    Yamaha r6 5SL
    No not yet that was my nxt step my mate comin to have a look for me in the week have you got any tips on cheking the timing
  4. jack topper Husqvarna
    AA Class

    Location:
    Cascade, MT
    Husqvarna Motorcycle:
    1974 400WR
    Other Motorcycles:
    honda, yamaha, suzuki, Indian, Kawas

    Luke, I did a quick check online and found that your engine appears to have come with "Digital CDI (variable timing)". The key word in that quote is "variable", which makes me think there could be quite a range of timing settings. If you don't have manuals for it you could probably find links to free downloads on this site or elsewhere on the net.
    JT
  5. Luke eccles Husqvarna

    Husqvarna Motorcycle:
    2004 SM 450R
    Other Motorcycles:
    Yamaha r6 5SL
    Okay
    Okay mate cheers il have a look an see how i get on
  6. jack topper Husqvarna
    AA Class

    Location:
    Cascade, MT
    Husqvarna Motorcycle:
    1974 400WR
    Other Motorcycles:
    honda, yamaha, suzuki, Indian, Kawas
    Luke, I ran across this statement in the General (main) 96 610 no spark thread from Robertaccio: "I recall Up-Tite Husky doing a common issue repair to flywheel/rotor assembly because the magnets actually slip within their epoxy as an assembly screwing up the timing. Verify the that the magnets are solid to eliminate that possibility." Don't know if it would apply in your case or not.