3D printed in PLA+ tough and durable comes in a 2 pack. (video at bottom of page)
Original designed to fit a 125 monkey but will fit to any oil filler hole that is threaded M20x2.5mm
note i also sell this in an angled version here for easier filling where the cap is at a difficult angle: Here
Known to Fit:
Honda CT125
Honda Monkey125
Honda Dax 125