Spark Plug Hole Thread Repair

  • SWest
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04 Jun 2022 09:51 #868207 by SWest
Replied by SWest on topic Spark Plug Hole Thread Repair
Yes. 
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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04 Jun 2022 09:53 #868210 by Mikaw
Replied by Mikaw on topic Spark Plug Hole Thread Repair

Yes. 
Understood, Thank you.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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04 Jun 2022 09:58 #868212 by SWest
Replied by SWest on topic Spark Plug Hole Thread Repair
Still have to be careful not to cut off angle but safer than without it. 
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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04 Jun 2022 10:53 - 04 Jun 2022 13:24 #868221 by daveo
Replied by daveo on topic Spark Plug Hole Thread Repair
The M14 (small) portion of the tap was able to grab the remnant thread base on the hole wall, even after 90% of it was pulled out like a spring coil, which began this whole adventure.

[img


Should anti-sieze compound be applied to the threads, considering more of the steel insert core material becomes exposed as the plugs are removed and replaced? 
 
1982 KZ1100-A2
  • 20220603_191337.jpg
    • Last edit: 04 Jun 2022 13:24 by daveo.
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    • Scirocco
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    04 Jun 2022 12:04 - 04 Jun 2022 12:08 #868227 by Scirocco
    Replied by Scirocco on topic Spark Plug Hole Thread Repair

    Should anti-sieze compound be applied to the threads, considering more of the steel insert core material becomes exposed as the plugs are removed and replaced? 






     
    No, the last two un-cut threads will help to turn in the in-sert and will be pressed/formed into the head aluminum after the insert is fully seated and do a permanent lock. Didn´t you watch the YT video? You can use anti sieze but it´s not necessary.

     
     
     
    My 1975 Z 1 B 900 Project

    www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
  • time_sert_pressure_lock_zone.jpg
  • pressure_lock1.jpg
  • time_sert_lock2.jpg
    • Last edit: 04 Jun 2022 12:08 by Scirocco.
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    • SWest
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    04 Jun 2022 12:39 #868229 by SWest
    Replied by SWest on topic Spark Plug Hole Thread Repair
    Did you use the expanding tool after you were done. It's supposed to expand the bottom few threads to lock the insert in place. You screw it into the insert past the resistance of the last few unfinished threads. That makes the bottom expand locking it in place. 
    Z1b1000 1975 Z1b
    kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
    kzrider.com/forum/2-engine/597654-poser?start=240#704229
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    04 Jun 2022 13:21 - 04 Jun 2022 13:34 #868233 by daveo
    Replied by daveo on topic Spark Plug Hole Thread Repair
    Hey guy's, I'm wondering if I should use anti-sieze on the SPARK PLUG threads, not the inserts...

    [img


    Sorry I didn't ask the question more clearly.   But hey, my mind is out riding today.
    1982 KZ1100-A2
    Last edit: 04 Jun 2022 13:34 by daveo.

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    04 Jun 2022 15:26 #868237 by Nessism
    Replied by Nessism on topic Spark Plug Hole Thread Repair

    Hey guy's, I'm wondering if I should use anti-sieze on the SPARK PLUG threads, not the inserts...

    [img


    Sorry I didn't ask the question more clearly.   But hey, my mind is out riding today.

    I knew what you meant!  
    [img

    And my vote is YES.  Can't hurt.
    Ed
    Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

    www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

    1981 KZ750E2
    www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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    04 Jun 2022 16:38 - 04 Jun 2022 16:41 #868239 by blipco
    Replied by blipco on topic Spark Plug Hole Thread Repair
    Yes, always anti-seize on spark plug threads unless you enjoy gauling the threads, which I bet you don’t.
    BTW, that’s a beautiful repair. Better than stock.
    "Swim against the current, even a dead fish can go with the flow"-somebody (I forget Who)
    Last edit: 04 Jun 2022 16:41 by blipco.

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    04 Jun 2022 17:33 #868240 by 650ed
    Replied by 650ed on topic Spark Plug Hole Thread Repair
    I've owned my 1977 KZ650-C1 since it was new (Feb. 1977) and have never used anything on the spark plug threads.  I have never experienced a problem.  The bike now has more than 61,000 miles on it.  Ed
    1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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    • Ojisan rider
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    04 Jun 2022 20:54 #868251 by Ojisan rider
    Replied by Ojisan rider on topic Spark Plug Hole Thread Repair
    It's just me, but I'm a firm believer of " Having it and not needing it than needing it and not having it." Firearms, spare parts and anti-seize included.
    82' KZ750-R1 cafe racer style. Clip-on, Rear set, Fork-Brace, Mikuni Flat-slide (forgot the size), Kerker.
    84' GPz750 (basket case). everything are in pieces.
    89' ZX750-H1 (ZX-7 Ninja). Resurrection project are on going with my KZ750. Everything is stock.

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    04 Jun 2022 21:02 #868255 by Ojisan rider
    Replied by Ojisan rider on topic Spark Plug Hole Thread Repair
    Also, just found this. I'm not Z1/Z2 specialist, so not sure if this is the right head, and how hard to fix it.

    page.auctions.yahoo.co.jp/jp/auction/c1053000580

     
    82' KZ750-R1 cafe racer style. Clip-on, Rear set, Fork-Brace, Mikuni Flat-slide (forgot the size), Kerker.
    84' GPz750 (basket case). everything are in pieces.
    89' ZX750-H1 (ZX-7 Ninja). Resurrection project are on going with my KZ750. Everything is stock.

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