Dirty Bike Industries X-tension Seat riser kit is a must for taller riders. It moves the seat 2.75" (70mm) higher and 1.75" (45mm) back to give you much more room in the cockpit. This kit makes the bike more comfortable and will ease the transition from sitting to standing. In the standing position it allows you to grip the seat better with your legs for better control over rough terrain.
If you want to add a shock protector you will need the DirtyBike extra long 13.5" model.