Wet front cylinder spark plug

Discussion in 'Sportster Models' started by Mjolnir, Dec 5, 2012.

  1. Mjolnir

    Mjolnir Member

    9
    0
    1
    Hi there,

    I have a 2004 1200 XLC. Picked up a vibration at midrange recently with slight loss of power going uphill. Proceeded to check all engine/ frame mounts etc. All good.

    During this process decided to check idf spark plugs are tight as I thought that that might be the reason for loss of power. Discovered that the rear piston spark plug burns nicely but the front piston spark plug was slightlty wet and smelled of fuel. Also noticed that the frame close to the front exhaust is dirty with black root.

    Could this be an indication of:
    1. Burnt/ damaged valves?
    2. Damaged piston rings?
    3. Combination of both?
    4. Other?

    Thought of having a compression test done and then see what gives?

    Any advice will be most welcome.
     
  2. Hoople

    Hoople Account Removed

    7,198
    0
    34
    Could be a simple ignition problem. Perform a proper compression test or cylinder leakage test and you will know where you stand.

    Carb bike? Has any performance mods or bone stock. Mileage on engine. Some info helps.
     
  3. BUBBIE

    BUBBIE Well-Known Member

    4,959
    83
    113
    Trying a New set of 6R12's from HD,,, good and inexpensive to do...

    Along with a new ignition wire set, color matched are good and not costly.

    Being an 04 IF never changed, wires Might contribute to this problem.


    signed....BUBBIE

    I missed all that you will do Listed under your post,,,,I Must be going Blind here..... Check all and the simple things first.
     
  4. Jack Klarich

    Jack Klarich Expert Member

    18,544
    153
    399
    Keep it simple as Bubbie and Hoople have said, could very well be as simple as a bad plug and or wire, compression test first:s
     
  5. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

    5,276
    133
    156
    The gaskets between the head and the exhaust header pipe may need replaced but the nuts holding the header pipe in place can come loose and give a wee exhaust leak
    Compression test new plugs and wires is the way i would go to start with

    Brian
     
  6. Mjolnir

    Mjolnir Member

    9
    0
    1
    Thanks Guys,

    Much appreciated. Will try all and let you know.