Spark Plug tube sealing O-ring

I will do valve clearance checking soon and wanted to replace the o-rings preemtively (fixing something that ain't broke).

Is the o-ring in the cylinder head accessible/can be replaced easily without removing the cambox?

Thanks

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Yes, it can be done, it's a bit of a frontbottom to ensure that its seated in its groove and you don't want to try when the head is hot but it's wuite doable with the Cambox on.

Pete

thanks Pete

My GRiSO celebrated her 5 years old birthday last week. I have changed the o-ring in the rocker covers but those in head are from the factory.

I thought it make sense by changing them now since they cost less than a dollar a piece (I bought the Viton type), rather than messing with degreaser later when they start to leak.

Mine started leaking on the left after a few thousand miles. The right side never leaked ???

I replaced it five times and got it to stop temporarily with a thin coating of three-bond per Mr. Roper's emailed instructions.

Each time I cleaned the area thoroughly with the spark plug in place and then speared the oring with a sharp angled dental pick. A smear of three-bond and the ring went right back into the groove. Spark plug still in place to keep unwanted debris out of the expensive bits.

I solved the problem permanently by selling my '09 and replacing it with an '07 this past Saturday. Pictures to follow.