School me Sparky!! - Spark Plug Variety

Discussion in 'Trials' started by Greebe, Nov 1, 2018.

  1. Ymirtrials

    Ymirtrials Long timer Supporter

    Joined:
    Jan 12, 2012
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    1,218
    Location:
    Ymir BC Canada
    Does the enamel hold up on fasteners even at higher torque requirements like head bolts/studs?
    #41
  2. Junglejeff1

    Junglejeff1 Long timer

    Joined:
    Oct 20, 2016
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    Upper Michigan
    They worked for me and thanks.
    #42
  3. Junglejeff1

    Junglejeff1 Long timer

    Joined:
    Oct 20, 2016
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    Location:
    Upper Michigan
    Years ago I purchased one of those hot coat guns from Eastwood. I drill holes in copper flashing,drop them in and powder coat them.works great on Allen heads but tends to chip on nuts and bolts.If I am working on other people's bikes will clean and coat with antisieze. Unreal how well that stuff stops corrosion. I always wanted to try cadmium coating but never seem to find the time.
    #43
    Ymirtrials and Brewtus like this.
  4. Thumbster

    Thumbster Adventurer

    Joined:
    May 28, 2019
    Oddometer:
    34
    Location:
    Eastern Indiana
    Ok, for us in the back of the room...

    Denso W16FPR-U = NGK BPR5HS

    Is that correct?

    From what I have read the Denso “F” and NGK “H” designate 1/2” (12.7mm) reach.

    The Denso “16” and NGK “5” are heat range but I don’t know if they’re similar.

    The P and R on both plugs mean projected electrode and resistor (insulated).

    The Denso “U” indicates it’s their standard (not fancy) plug and I assume the NGK “S” means the same.

    I don’t know what the Denso “W” or NGK “B” means.

    fwiw the Denso W16FPR-U came with my 2018 Factory Sherco 250.
    #44
  5. Thumbster

    Thumbster Adventurer

    Joined:
    May 28, 2019
    Oddometer:
    34
    Location:
    Eastern Indiana
    To answer my own question. I found this heat range chart on NGK’s site.
    9823683A-6C0F-42A7-B98F-860F025E8C82.jpeg
    #45
  6. Thumbster

    Thumbster Adventurer

    Joined:
    May 28, 2019
    Oddometer:
    34
    Location:
    Eastern Indiana
    Not sure the longer 3/4” (19mm) plug will fit even though the manual and 3 dealers say it will. Central Kentucky Motorsports even looked it up on the parts fiche and it said use longer plug.

    This is the 1/2” (12.7mm) plug next to my certified McDonald’s straw showing how much room I have to the piston at TDC.

    Assuming the 3/4” (19mm) plug is actually 22.56mm counting the electrode that only leaves 4.24mm (a little over 1/8”) between the plug and piston.

    I’m no engine builder but I think I’ll stick with the 1/2” plug unless someone can convince me otherwise. 1/8” seems pretty close.
    2EFEEDE9-4777-4497-B422-AF3ABF23195D.jpeg
    #46