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Thread: 4th cylinder back fire problem

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  1. 4th cylinder back fire problem 
    #1
    Active Member
    Join Date
    Apr 2010
    Posts
    67
    Hello everyone,

    I have problem as per video http://www.youtube.com/watch?v=76XVMPyr0VE

    Happens only on cold (without choke), and when idle revs.
    Problem goes away when warm or on higher revs.

    Before done: oil/filter change, valve clearance, carb clean-up. Carbs are set 3 rev's back on idle screw (by the Haynes book) and are due for adjusting and balancing.
     
     

  2. Re: 4th cylinder back fire problem 
    #2
    Chatterbox Jon_W's Avatar
    Join Date
    Sep 2009
    Location
    Loacation Loaction
    Posts
    5,133
    looks like you have a split inlet rubber....
    "there's no aspect, no facet, no moment in life that can't be improved with pizza"

     
     

  3. Re: 4th cylinder back fire problem 
    #3
    Active Member
    Join Date
    Apr 2010
    Posts
    67
    It seems to be a bit better after re-checking valve clearance. One of inlets was too tight. Maybe it was too cold when I done it first time?!?
    Waiting for colortune to adjust carbs as I think they run to rich. Will update later
     
     

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