Welcome, Guest
Username: Password: Remember me
Forgot your password? Forgot your username? Create an account
Forum
Index of Forums
Technical Forums
Engine
Spark Plug Hole Thread Repair

TOPIC:

Spark Plug Hole Thread Repair 28 May 2022 16:22 #867827

  • daveo
  • daveo's Avatar Topic Author
  • Offline
  • Premium Member
  • Posts: 2766
  • Thank you received: 632
Time-Sert time.  


#3 spark plug hole is the culprit, and two others seem likey to become problems too.  May as well do them all while I'm at it

Which insert material is the best choice to use for a trouble free and permanent fix?

1982 KZ1100-A2

Attachments:

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 16:54 #867832

  • gordone
  • gordone's Avatar
  • Offline
  • Sustaining Member
  • Posts: 1373
  • Thank you received: 67
I purchased a kit like these when I damage my threads some years ago, it has worked perfect since.

I think these is high quality, german quality?

www.klickparts.com/en/workshop/hand-tool...x1-25-kp1240261.html
1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 17:40 #867834

  • daveo
  • daveo's Avatar Topic Author
  • Offline
  • Premium Member
  • Posts: 2766
  • Thank you received: 632

I purchased a kit like these when I damage my threads some years ago, it has worked perfect since.

I think these is high quality, german quality?

www.klickparts.com/en/workshop/hand-tool...x1-25-kp1240261.html

Need Time-Sert inserts and kit.  Only need four inserts made specifically for 3/4" spark plug thread length. 
No desire to use aluminum inserts.  Steel inserts would work, but steel may/may not be the best material choice.


 
1982 KZ1100-A2

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 17:50 #867836

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Never change a running system
  • Posts: 3926
  • Thank you received: 1899
Würth aka Wurth Time Sert is the best.

M14 x 1,25 inserts are available in 7,0 / 8,0 / 9,4 / 11,0 / 15,0 / 16,8 mm length.

The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Last edit: by Scirocco.

Spark Plug Hole Thread Repair 28 May 2022 17:51 #867837

  • SWest
  • SWest's Avatar
  • Offline
  • Sustaining Member
  • 10 22 2014
  • Posts: 22427
  • Thank you received: 2620
I should have gone Helicoil as I planned to do in the first place. 
Steve
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 18:08 #867841

  • daveo
  • daveo's Avatar Topic Author
  • Offline
  • Premium Member
  • Posts: 2766
  • Thank you received: 632

I should have gone Helicoil as I planned to do in the first place. 
Steve

1982 KZ1100-A2

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 20:02 #867843

  • daveo
  • daveo's Avatar Topic Author
  • Offline
  • Premium Member
  • Posts: 2766
  • Thank you received: 632
A few Wurth inserts below.  Seeking recommendations.

www.wurthusa.com/Service-and-Repair-Part...1-25X15/p/0662141254

www.wurthusa.com/Service-and-Repair-Part...-Insert/p/0662914126

www.wurthusa.com/Service-and-Repair-Part...1-25X17/p/0662141255

 
1982 KZ1100-A2

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 28 May 2022 23:20 #867845

  • willemZ900
  • willemZ900's Avatar
  • Offline
  • User
  • Z1B 4 ever
  • Posts: 178
  • Thank you received: 52
Eleven years ago I used a helicoil on cylinder two with the cylinder head in situ. No problems at all and bike is still going strong. 
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 29 May 2022 08:53 #867864

  • daveo
  • daveo's Avatar Topic Author
  • Offline
  • Premium Member
  • Posts: 2766
  • Thank you received: 632

Eleven years ago I used a helicoil on cylinder two with the cylinder head in situ. No problems at all and bike is still going strong. 

Helicoil R513-10, 3/4" reach.  Would that be the correct length to use?

If the Helicoil fails, will a standard (NOT Big-Sert) M14 x 1.25 Time-Sert insert work to replace it?


Or...is the Helicoil Sav-A-Thread 5334-14 kit insert a better choice?
Ebay item 304009706232

1982 KZ1100-A2

Please Log in or Create an account to join the conversation.

Last edit: by daveo.

Spark Plug Hole Thread Repair 29 May 2022 10:09 #867866

  • Street Fighter LTD
  • Street Fighter LTD's Avatar
  • Offline
  • Moderator
  • TURBO, Its Better to be Blown than Injected
  • Posts: 4825
  • Thank you received: 1969
First time my head came off  I put sparkplug inserts in .
Knowing how anal my buddies and I were with our Kaws it made sense.
 We were always tuning , checking , and changing  parts on our scooters to keep our edge over the rest of the Detroit crowd.
plugs to us were and still are a disposable commodity  in the search for a tenth advantage in a race
Happy Memorial Day Weekend 
Dave
 

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 29 May 2022 11:43 #867867

  • Nessism
  • Nessism's Avatar
  • Offline
  • Sustaining Member
  • Posts: 7283
  • Thank you received: 2674
Helicoil, Time-sert, or special spark plug insert, all will hold the spark plug in place if done correctly.

One question though: is heat transfer to the plug affected by the metal sleeve type inserts?  I suspect it changes things, but maybe not enough to matter?
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.

Spark Plug Hole Thread Repair 29 May 2022 11:58 #867869

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Never change a running system
  • Posts: 3926
  • Thank you received: 1899
Time Sert inserts are copper plated for the heat transfer.
The following user(s) said Thank You: daveo

Please Log in or Create an account to join the conversation.
Forum
Index of Forums
Technical Forums
Engine
Spark Plug Hole Thread Repair
Powered by Kunena Forum
PDM Custom Fabrications
Half Evil Customs