Replacing the head vs heli-coiling - 600RR.net
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post #1 of 4 (permalink) Old 04-23-2017, 05:51 PM Thread Starter
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Replacing the head vs heli-coiling

So I finally have time again to get around to fixing my bike. From my other posts, I ended up realizing I need to not only replace the harness but I goofed up the threads for a spark plug hole.

I've been shopping around and a head off a junked bike isn't too expensive. My main question is this:

Should I replace the head I have, or yank the head (I have to do a shim job anyway on it and pulling the head doesn't seem TOO difficult) and bring it into a machine shop for helicoiling the spark plug hole?

Second question: How difficult is it to yank the head? Can I do it without dropping the engine? The placement of the engine seems pretty terrible. Hayne's manual says I have to basically pull the bike in two to get it out.


Thanks!
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post #2 of 4 (permalink) Old 04-23-2017, 07:42 PM
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I'd try to repair before replacing, but with a timesert instead of a heli-coil.
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post #3 of 4 (permalink) Old 04-24-2017, 03:59 PM
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I would replace the head. But that's just me. If it's stock it's rather cheap.

Pull the engine.
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post #4 of 4 (permalink) Old 04-24-2017, 11:21 PM
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You could try repairing/chasing the threads with a backtap tool as a first resort, depending on how badly you messed up the threads.<br />
<br />
Not to be a dingaling, but if you are stripping spark plug threads, you should look deep within your soul and decide if your mechanical aptitude is up to the job of removing and replacing the head without screwing something else up. You might be a mechanical genius or a klutz but you should think about it first.
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