rear set kawasaki zx 4rr 2023 reverse shifting ecu flashRear Set Kawasaki ZX 4RR (2023 ) reverse shifting "ECU flash" fully adjustable rearest for Kawasaki ZX 4RR (2023 ) with reverse shifting "ECU flash" or replacement of the Quickshifter is required for correct operation of the reverse shifting in levers is ball bearing 22mm, carrying water resistant seals 10 option of positions from 4 to 34 mm (see picture) material: aluminium aloy 7075 T6 adjustable levers according to the boots size hard black