SOHC.co.uk Forums > CB750

CB750 F1 spark plug needs Helicoil

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Priddy:
Hi all, I have had issues from day 1 with no 3 spark plug and it is obvious I need to address this as although the plug is in the thread is not good. I am assuming its an engine out/head off job. Anyone experience of this job/Helicoils?

Bryanj:
Somebody with experience and skill can helicoil in situ but it is a risk, when in the trade we always gave the customer the option to weigh cost against risk and only ever had one where the engine had to come out afterwards.
As helicoil kits are not cheap it may be worth paying for it to be done

EDIT "proper" helicoil kits are not cheap

Priddy:
Yes considered in situ but as no 3 (hardest to access) I figured remove the head and get done properly by someone with experience.

hairygit:
If you're taking the head off to do it, consider spending a bit more and find an engineering firm that uses Wurth "Timeserts" which are far superior to helicoils for strength and heat dissipation

Sent from my POT-LX1 using Tapatalk

Trigger:
Timesert for through hole. helicoil for blind hole  ;)

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