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Spark Plug Hole Thread Repair 04 Jun 2022 09:51 #868207

  • SWest
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Yes. 
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Spark Plug Hole Thread Repair 04 Jun 2022 09:53 #868210

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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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Spark Plug Hole Thread Repair 04 Jun 2022 09:58 #868212

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Still have to be careful not to cut off angle but safer than without it. 
Steve
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Spark Plug Hole Thread Repair 04 Jun 2022 10:53 #868221

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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.



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

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Spark Plug Hole Thread Repair 04 Jun 2022 12:04 #868227

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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.

 
 
 
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Spark Plug Hole Thread Repair 04 Jun 2022 12:39 #868229

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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. 
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Spark Plug Hole Thread Repair 04 Jun 2022 13:21 #868233

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



Sorry I didn't ask the question more clearly.   But hey, my mind is out riding today.
1982 KZ1100-A2

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Spark Plug Hole Thread Repair 04 Jun 2022 15:26 #868237

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



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

I knew what you meant!  

And my vote is YES.  Can't hurt.
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Spark Plug Hole Thread Repair 04 Jun 2022 16:38 #868239

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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)

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Last edit: by blipco.

Spark Plug Hole Thread Repair 04 Jun 2022 17:33 #868240

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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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Spark Plug Hole Thread Repair 04 Jun 2022 20:54 #868251

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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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Spark Plug Hole Thread Repair 04 Jun 2022 21:02 #868255

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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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