I used a rubber mallot on my yamaha when i restored the suspension. If you break the bearing they are fairly cheap, as far as snowmobiles go, to replace. I had to use a hammer on all of mine. If its possible to take the wheel off the bearing first so you don't break it is best. I broke 1 of the 8 i took off with a hammer.
1999 SkiDoo Formula Z 500- mine
2000 XL1200 Sportster customized
96 SkiDoo Formula SLS 500 -sold 1/31/13
81 AC Jag 4000 3500 miles sold 1/13/12
74 MotoSki Futura 340 2200 mls sold 6/15/12
"What ever you do don't eat the Calamari"