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greg737 · May 22nd, 2011, 08:13 AM

Just at a glance I think it's one of two drain holes (one on either side of the head) for the spark plugs. Remember that the spark plug holes are very deep in the engine's head.

May 22nd, 2011, 08:13 AM	#3
greg737 - Name: - Location: - Join Date: May 2009 Motorcycle(s): - Posts: A lot.	Just at a glance I think it's one of two drain holes (one on either side of the head) for the spark plugs. Remember that the spark plug holes are very deep in the engine's head.