M900 Monster Problem

Discussion in 'Monster' started by chris.murg, Dec 21, 2013.

  1. Hi
    I have a M900 1995 that is running rich on one cylinder. Carbs all checked OK and set up roperly. new float kit fitted but still rich on one cylinder, any ideas?
     
    #1 chris.murg, Dec 21, 2013
  2. if you are certain it's not carbs then could be ignition pick-up is set slightly retarded on rich cylinder but only a long shot (plus rear runs slightly richer anyway generally). Could it be oil ingress (valve stem guide weep/piston rings) rather than richness? Worth a compression check on both for a start.
     
    #2 Chris, Dec 21, 2013
  3. Good pont as I have recently replaced the ignition pick-ups. Plugs are a bit sooty not oily and rear fauls in about 3 miles in traffic
     
    #3 chris.murg, Dec 21, 2013
  4. I know it's an even long shot, but are you sure choke is fully returning when you shut off lever?
     
    #4 Chris, Dec 21, 2013
  5. Choke? Well worth checking!
     
    #5 chris.murg, Dec 21, 2013
  6. also plug rating - I use NGK D8EA on mine.
     
    #6 Chris, Dec 21, 2013
  7. Hello and welcome! Hope you get the problem sorted soon.
     
    #7 Archer17, Dec 22, 2013
  8. OK choke checked and it was not that but worth checking all the same.
     
    #8 chris.murg, Dec 22, 2013
  9. Hello and welcome :smile:
    oh and moved to Monster :upyeah:
     
    #9 mattmccabebrown, Dec 23, 2013
  10. Just a thought, I've played with a few carb'd Monsters now, and the float heights always seem worng on them. Could be worth taking the carbs apart, cleaning and setting up correctly as a matter of course....
     
    #10 Bluestoesonnose, Dec 24, 2013
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