Cano,
See bottom of this web page
http://www.shercousa.com/content2.cfm?action=9

Thank you David for your prompt reply.
I thought the same thing about the parts list but it seems to be the same across all models. I'm sure you're right that the seal is on the other side of the bearing.
Here's a handy site for Sherco folk: http://www.shercousa.com/content2.cfm ...

Thanks to those who replied with great suggestions. After looking at all suggested items I decided to throw the bike on the trailer and shoot it across to the folks at Powerhouse Pakenham Vic. I described the issues and took a look at it for me. The bike runs absolutely perfect now. Starts first ...