This part is designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from 12 -20mm and 28mm or

Suitable for Standard O

92 m² / 1430 in² rear

the arm is not included in the kit

For detail see this PDF file

BMC Air Filters - Yamaha Fazer 600 High Performance Air Filter Option:Standard (FM301/08) This part is designed toThis High Performance air filter is made from premium material that allow increased air flow and filtration efficiency, blocking containment as small as 7 microns (compared with 10 microns in most other filters). BMC air filters are produced using a "Full Moulding" system. This prolongs the life and durability of the filter. The rubber used in BMC air filtering systems has a long life with optimum adhesion characteristics to all shapes of airboxes.