while there id replace the oil pressure sender and oil temp sender for 1/8npt ones. they will screw in to the 1/8bsptt holes fairly easily with some thread lock. or retap... (youll have to replace gauges though as of course nissan used their own senders on the R).
All those who said ringlands couldn't have been more right. This is number 3 piston, Both ringlands have about two inchs of damage. All the other pistons have simular damage too so I'm now in the business for some pistons!