That's easy.
The friggin plugs don't use the compression style ring on them right? It's the metal bevel that seals to the head right?
When I run my falcon Hard, the vibration from the imbalanced clutch makes my plugs loosen up and well as other parts too....
Have the guy use ANTI SEIZE lube on the threads of the plugs. It's silver and messy, but I'll bet a dollar against a doughnut that it stops them from backing off!
I didn't sy use Loc-Tite, I said use
Anti Seize.
The substance will help to dampen vibration and that will help the plugs stay where they are put.
Tell him to also check his timing, don't ask why, but check it to make sure it's where the factory say's it should be.
FE
P.S> Welcome to Fm dude! Nice Birdie you got there! Where's the rest of the pics?
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My fellow Americans, I have not been entirely truthful with you. I did gagoogity that girl. I gashmoigitied her gaflavity with my googis. And I am sorry.