Used by team Can-Am Pro racers; This stabilizer is extremely adjustable and rugged. The unit comes with all hardware needed for an easy installation and mounts up to your 1st generation Outlander 800, 650, 500 in approximately 20 minutes; no drilling, welding, or grinding needed. The Pro stabilizer has a built in reservoir to compensate for thermal expansion. The stock steering stem diameter for the Outlander is 1.25". All known after market stems will fit.