balancer

Hi everyone My trusty little 470 Berg (engine) is at my local dealers (Gary Grover Racing) for a bottom end rebuild as the mains had started to go. I race supermoto and really like the way the power is delivered as it revs and just keeps on revving. While the engine is apart I thought...

OK, ive decided to keep my counterbalancer, but ive got a new bearing for it. how do you get this thing off, do i use a puller or what?