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  1. #1
    Junior Member
    Join Date
    Nov 2013
    Posts
    1

    83 CX650 timing issues

    Hello all,
    I have an 83 CX650 that ran well and now it backfires when I try to start.
    How do I adjust/check timing?
    Have great hopes that this forum can provide the answer.
    All the best,
    Doug

  2. #2
    Senior Member murrayf's Avatar
    Join Date
    Apr 2011
    Location
    Lexington NC
    Posts
    11,364
    the timing is not adjustable as a matter of normal maintenance it is adjusted with the engine removed from the bike
    GET AN OIL FILTER ADAPTER

    Order The Quick Build Exhaust Pipes


    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

  3. #3
    Senior Member murrayf's Avatar
    Join Date
    Apr 2011
    Location
    Lexington NC
    Posts
    11,364
    what happened that it quit? or why do you think its timing
    GET AN OIL FILTER ADAPTER

    Order The Quick Build Exhaust Pipes


    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

  4. #4
    Senior Member
    Join Date
    Jun 2013
    Location
    north little rock,ar.
    Posts
    214
    did you check the spark plugs to make sure your getting spark at each plug ?..worth checking before you go tearing into it. as murrayf said..unless your spark plugs are bad ?..i see no other way it could have jumped time unless your cam chain jumped time ?, and this will require droping the engine to remove the rear cover to get to the cam chain. you can also check your pick up coils at the back of the motor..for the most part..this does not require you to drop the motor.
    1985 vf700c magna, 1983 cx650c is done ! ( for sale now ).

  5. #5
    Senior Member DavidfromWisconsin's Avatar
    Join Date
    Aug 2010
    Location
    Appleton, WI
    Posts
    2,811
    Also try replacing the plug wires with solid core wires.
    Formerly David from Wisconsin
    Formerly R80Dave
    GL500I "Candy"
    BMW K1200LT
    Kawasaki 400LTD (Wife's learning bike)
    Mentoring is available

  6. #6
    Senior Member Gerard's Avatar
    Join Date
    Jan 2012
    Location
    Delta, British Columbia, Canada
    Posts
    236
    Hi, Leaking intake valve can also cause it to backfire. or worn off exhaust cam lobe. cheers Gerard
    current bikes,

    1983 CX650e 73k

    1983 CBX550f 60k

    1981 GL500I 94k

    Shiny up Rubber Down

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