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Thread: Spark plugs

  1. #1
    Member Delboy's Avatar
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    About 300 miles on a new plug, mostly road. Is this a good burn? If not, any remedies suggestions?



    Thanks
















  2. #2
    Senior Member PalmStateCrawler's Avatar
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    Looks good to me
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

  3. #3
    Banned qwerty's Avatar
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    I see spots.




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  5. #4
    Senior Member rm_hm's Avatar
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    Your plug looks just like mine looked like after 400 miles off the showroom floor.









    http://www.dansmc.co...gs_catalog.html



    http://www.4strokes....ch/sparkplg.asp



    http://www.dansmc.com/sparkplugs1.htm





    Lean signs

    • Poor power output
    • Hard to start when cold - requires excessive choking.
    • Lengthy warm-up required.
    • Runs better (but not good as it warms up)
    • Spark plugs overly clean..with no deposits or slight glazed appearance
    • Rough, erratic idle that drifts toward higher rpms than expected based on the setting of the curb idle screw. Sometimes a lean condition will cause a "hanging" idle that is slow to settle down to set idle speed.
    • Backfiring
    • Sluggish...hesitates when the throttle is opened, then recovers (often accompanied by a slight backfire)
    • Vague throttle response
    • Surging at steady throttle cruise operation
    • When fully warmed up, runs better when choke is applied.
    • Engine runs hotter than normal. Headers can turn cherry red in extreme cases!
    • Temporarily removing air filter element makes the engine run worse.
    • Unusual "sucking" noises in the intake area.
    • Runs better as you climb to higher elevations
    • Slight back-firing on deceleration. This normal tendency is controlled by the air cut-off valve(s) operation. If the air cutoff valve(s) is working properly and you still have backfiring on deceleration, something is causing a lean condition.
    • Exhaust pipe deposits are light gray in color


  6. #5
    Senior Member bcscammell's Avatar
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    My plug looked very similar to your's when my bike was running lean.(surging at constant throttle positions) While the plug condition is only one of the indicators of proper fuel air ratios yours does appear to be somewhat lean. How is your bike running?

  7. #6
    Member Delboy's Avatar
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    Quote Originally Posted by Gun Ship View Post
    My plug looked very similar to your's when my bike was running lean.(surging at constant throttle positions) While the plug condition is only one of the indicators of proper fuel air ratios yours does appear to be somewhat lean. How is your bike running?




    My bike is running great. No issues at all. However, I did, like you, think that the burn looked lean. Other than the spark plug I have no other evidence that the bike is running lean.



    I have none of Qwerty's Too Lean symptoms listed below.



    Too lean:

    Engine dies when throttle opened quickly.

    Engine runs hot.

    Ping (pre-ignition).

    Surging while throttle held steady.

    Popping back through the carb during deceleration.

    Power loss.

    White or yellow powdery deposits on spark plug.

    Possible burned valves or holed piston.

  8. #7
    Senior Member jbfla's Avatar
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    Quote Originally Posted by Delboy View Post
    My bike is running great. No issues at all....
    If your bike is running "great", the plug is fine, don't mess with it, ride it.



    jb
    2018 Triumph Street Twin..............2016 CB500F
    2014 XT250 ..................................2008 H-D Softail Deluxe
    2008 SV 650..................................2007 DR 650..

  9. #8
    Senior Member bcscammell's Avatar
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    Like jbfla says, if it's running good don't mess with it.

  10. #9
    Junior Member Klxelic's Avatar
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    Hey Del, plug looks good to me. 300 clicks aint a lot and I see some brown starting to show.

    Have ya looked at it again lately?
    "... so take my comments with a grain of salt (just trying to up my post count

    to make it look like I know what I'm talking about) " - jlmoulto



    2012 Odometer: 10584 Kms



    KLR: 6046 Kms

    KLX: 3630 Kms

    TW: 900 Kms



    1996 KLR650 (23,000 + ) Kms

    2007 KLX 250 (41,000 +) Kms

    1997 TW200 (13,000 +) Kms

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