Best Spark Plugs T100 Bonneville

Discussion in 'Bonneville' started by DGBland, Mar 8, 2022.

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  1. DGBland

    DGBland Member

    My T100 Bonneville is starting to struggle a little on cold starting so I thought I would try a change of plugs first. After all its only on its second set in 30,000 miles.
    I would normally use ordinary NGK plugs but have been told Iridium plugs are better, particularly for cold starting. If anyone else has tried them is it a worthwhile change.

    Thank you
    David
     
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  2. capt

    capt Elite Member

    May 8, 2016
    2,951
    750
    western Australia
    New ones !!

    Only joking , fuel is more likely the problem , modern unleaded petrol dies very quickly , it can go Off in as little as two weeks or so .
    Not a bike , but a smaller engined car , I had a Hyundai excel , did over a hundred thousand km on one set of plugs !! Only used high grade 98 fuel !
    How old is your fuel , and what RON/grade ??
     
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  3. DGBland

    DGBland Member

     
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  4. DGBland

    DGBland Member

    I am not a fan of the new fuel and my little BSA runs rubbish on it. But the Triumph is in constant use and the fuel doesn't have time to go off. The new fuel may be the issue but as the bike is used daily I am slightly reluctant to use super unleaded due to the crazy cost of fuel at the moment
     
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  5. capt

    capt Elite Member

    May 8, 2016
    2,951
    750
    western Australia
    Just top up once a fortnight , can't hurt and may fix this issue !
     
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  6. PatW

    PatW Senior Member

    Apr 4, 2021
    762
    193
    Cymru
    As above, I don't think you'll notice the difference between iridium and standard NGK plugs unless your current plugs are fouled or failing, I have never used "normal" fuel in my bikes since leaded became unavailable, always super unleaded which doesn't imop give any performance boost but I do get an extra 5-10 miles range per tank fill up and possibly if they're telling the truth, less carbon deposits. Sadly its E5 99 Ron now so only time will tell what effect that will have on our triumph engines, on my old Laverdas the fuel lines turned cloudy and fuel taps started weeping within weeks of super unleaded having E5 ethanol added so I had to get Viton based pipes and seals.
     
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  7. KC1961

    KC1961 Member

    Nov 13, 2014
    48
    13
    West Lothian
    Some pictures?
     
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  8. PatW

    PatW Senior Member

    Apr 4, 2021
    762
    193
    Cymru
    20210119_162802.jpg
     
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  9. KC1961

    KC1961 Member

    Nov 13, 2014
    48
    13
    West Lothian
    PatW, thanks for posting that. Very nice. There's a guy lives near me who recently got a 1000SFC, black with gold frame, also a nice bike.
     
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  10. PatW

    PatW Senior Member

    Apr 4, 2021
    762
    193
    Cymru
    I had a 750 sf too, no pictures on this phone though
     
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  11. Iron

    Iron Elite Member

    Dec 29, 2021
    2,138
    943
    Bob Ross Studios
    Champions every time, throw those NGK things away.
     
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  12. joe mc donald

    Subscriber

    Dec 26, 2014
    13,705
    1,000
    slough / burnham
    I do use the iridium plugs in most of my bikes and believe they do help with starting issues.
    Joe
     
    • Disagree Disagree x 1
  13. PatW

    PatW Senior Member

    Apr 4, 2021
    762
    193
    Cymru
    If you have starting issues and you change the plugs and it helps-then you needed new plugs, iridium or not.
     
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  14. Tom Swift

    Tom Swift Member

    Sep 24, 2021
    92
    18
    USA
    The iridium only makes the plug last longer. It's the fine electrode that helps with getting the flame started by allowing the gases to flow better in and around the spark gap.
     
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  15. capt

    capt Elite Member

    May 8, 2016
    2,951
    750
    western Australia
    Laverda's
    IMG_20220314_213619_981.JPG
    Three here , foreground SFC, mid early '70's 3c, background , even earlier 3c
    IMG_20220314_214144_384.JPG
    The whole shed , bike just to right of Eric , "80"s jota , sliver Triumph Sprint "03" bike on ramp behind Eric a "70"s 1000 being built from scratch , engine and frame together, wheels on drum rear brake , front disc ! Tank , wiring , seat and other ancillary equipment in another shed !! All waiting their turn.
    There's also an "83" RGS right rear of second photo , it just needs some ignition repair's and carburettor's need cleaning out . 4 out of the six lav's run well , RGS needs TLC , the 1000 on ramp requires some Assembly

    IMG_20220314_213619_981.JPG
     
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