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Cross threaded tip of cylinder Kawasaki KZ400 1974
- kyan44
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- SWest
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Steve
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- Nessism
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Photo below shows a KZ400 cylinder. Which part is the "tip" and what was cross threaded?
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- Barry2
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1976 KZ900
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- kyan44
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Sorry I am a noob at this. But I have stripped 1/4 of the beginning threads of my spark plug cylinder. Would I need to re-tap it or is there a better way to fix it?
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kyan44 wrote: www.motorcycleclassics.com/~/media/Image...589806CBB44F52D98E33
Sorry I am a noob at this. But I have stripped 1/4 of the beginning threads of my spark plug cylinder. Would I need to re-tap it or is there a better way to fix it?
A special "thread chasing" tool should be tried first. Failing that, use a solid insert to repair the threads. An automotive machine shop will know what to do.
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- JR
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Easy to do and usually easy to fix.
A thread chaser tool like swest and Nessism said.
I made my own once by cutting longitudinal slots in an old spark plug but easier to get the tool. Go slow in and out and use grease to catch shavings. When done use compressed air to blow out any shavings or use a vacuum.
Probably stuff onYouTube . Search Spark Plug Hole Repair
1980 kz750E1, Delkevic exhaust
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- Patton
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Attempting with an ordinary tap to start the rethread at the top where the threads are crossed is a dicey proposition and risks damaging the threads even worse than they already are. Could easily result in a totally screwed-up un-repairable spark plug hole and needing a replacement engine head.
Good Fortune!
1973 Z1
KZ900 LTD
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Use a reverse tap that starts at the deep end where the threads are still good and which will cut anew through the higher damaged threads.
I had forgotten about reverse taps. Much better option than thread chasing
1980 kz750E1, Delkevic exhaust
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- kyan44
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I used this tool. And it was magical! Fixed my problem. Thanks guys!
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