KTM 450 EXC-F HOLES IN MY CYLINDER HEAD

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5/10/2018 3:31 PM
Edited Date/Time: 5/10/2018 3:33 PM

Hi there, I've took all my valves out of my cylinder head and found triangle like hole, not right through head, but seems to lead no where, hole is near bottom of where the rocker arm bolts go. Please see attachment.
This is the inlet side but there's also a smaller similar hole on the exhaust side.
ARE THESE OIL CHANNELS OR SHOULD THEY NOT BE THERE.
MANY THANKS,
CHRIS,
TOPCAT261076.
Ps sorry I can't seem to upload pics.

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