AUTOVIC 4-5 in Swing Arm Extension Kit M99N1811ALS1 for Razor MX650, SX500 and MX500

AUTOVIC swing arm extension kit designed for Razor MX650, SX500 and MX500 mini bikes. The kit extends and widens the swing arm by 4-5 inches and uses a slotted dropout design for manual chain adjustment. It is made from machined 6061-T6 billet aluminum and installs with a bolt-on design requiring one drill hole.