The Bolt Knock 5mm is the most widely applied product in the CRF50F 2011 (A) AUSTRALIA CAM CHAIN/TENSIONER ( two times ).
Some items from this specific schematic: Sprocket,guide, Chain,cam, Bolt Knock 5mm, Pin,dowel,8x12.
The component with the lowest price in the CAM CHAIN/TENSIONER schematic is the Bolt Flange 6x18.