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Thread: Spark plug thread SIZE??

  1. #1
    Join Date
    Oct 2002
    Location
    Northeast
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    16,678

    Spark plug thread SIZE??

    Hi guys, I'm busy as all hell and looking for some quick help...

    Without me doing the research, does anyone know what metric thread size and pitch most of our sparkplugs are?? Like for a 200X, 250SX, 350X, they all use the same thread - is it 14mm x 1,25 pitch?? (That's a guess...) Anyone, I need to buy some threaded inserts as well as a time-sert kit for a customers 350X heads.

    Just short on time.

    Thank you for any help...
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  2. #2
    Join Date
    May 2006
    Location
    Bowling Green KY
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    3,574

  3. #3
    Join Date
    Oct 2002
    Location
    Northeast
    --
    16,678
    Must be 14.25" - Good guess, lol..

    Thanks bud.
    WHO IS Q?? WWG1WGA!!


    86 ATC200X Flatrack ( I may not be fast but this is one FAST 200X!!

    86 ATC350X Motocross, 86 ATC452X Flatrack!!

    07 Weekend Warrior Toy Hauler

  4. #4
    Join Date
    Mar 2010
    Location
    Slidell, LA
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    4,323
    200x and 350x are 12x1.25
    Last edited by yaegerb; 10-02-2018 at 11:53 PM.
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  5. #5
    Join Date
    Oct 2002
    Location
    Northeast
    --
    16,678
    Why am I only finding 14mm inserts?? I can get a 12mm helicoil, but wanted to use a threaded insert... Not the 150$ kit though...

    Thanks for any help!
    Last edited by Dirtcrasher; 10-05-2018 at 10:42 PM.
    WHO IS Q?? WWG1WGA!!


    86 ATC200X Flatrack ( I may not be fast but this is one FAST 200X!!

    86 ATC350X Motocross, 86 ATC452X Flatrack!!

    07 Weekend Warrior Toy Hauler

  6. #6
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,323
    Here’s the kit I use but you need to get longer inserts. The second link is 24mm inserts

    https://www.ebay.com/itm/Time-Sert-1...-/291715528409

    https://www.ebay.com/itm/Time-Sert-1...-/272338110375
    Feedback for yaegerb: Click Here

    Need something blasted or polished or both? Send me a PM

  7. #7
    Join Date
    Oct 2002
    Location
    Northeast
    --
    16,678
    Thanks Yaeger... Still a good chunk tho...

    I normally have no problem buying tools, I just haven't ever needed one of these and only have one job to do.

    I can't pass the cost of the kit to the customer, so I'm trying to keep the cost down, that's all...
    WHO IS Q?? WWG1WGA!!


    86 ATC200X Flatrack ( I may not be fast but this is one FAST 200X!!

    86 ATC350X Motocross, 86 ATC452X Flatrack!!

    07 Weekend Warrior Toy Hauler

  8. #8
    Join Date
    Oct 2002
    Location
    Northeast
    --
    16,678
    Okay, I bought the real kit...

    Anyone need any threads repaired?? I gotta pay for this kit, lol....
    WHO IS Q?? WWG1WGA!!


    86 ATC200X Flatrack ( I may not be fast but this is one FAST 200X!!

    86 ATC350X Motocross, 86 ATC452X Flatrack!!

    07 Weekend Warrior Toy Hauler

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