Unlike the large design stock carrier

check the hole spacing of the base against your clutch/brake reservoir

See the threading diagram on this page

& 1 extra pin

waterproof compartment inside the lid offers space for smartphone or map

USWE - Hydro Hydration Backpack 4L Options:4L - Blue Unlike the large design stockThe MOTO HYDRO 4L Hydration Pack is a lightweight enduro backpack geared up with a small extra organizer compartment perfect for your favorite multi tool, first aid kit and extra snacks, or anything else you might want to bring with you. Stripped of any extras, the Moto Hydro 4L is the perfect lightweight companion on any long distance racing. The shoulder straps and back panel are well ventilated, to improve the airflow and reduce weight The hydro