2003 F650gs won't start

Discussion in 'Thumpers' started by ldrider, Jun 21, 2013.

  1. ldrider

    ldrider Been here awhile

    Joined:
    Oct 1, 2003
    Oddometer:
    438
    Location:
    Foresthill, CA
    I'm at the end of my wits with this one. Problem started out with a bad fuel filter/pressure regulator. Replaced that and can see a nice spray from the injector. I didn't think I had good spark so I replaced the coil. Current problem is back-firing when trying to start. The valve timing seems good to me, and I made sure there is plenty of valve clearance. I do not know how to check ignition timing on this, or if the timing could be 180 out.

    Any help welcome.

    Thanks
    Joe
    #1