A novel mountain snowmobile comprises a frame, an engine disposed on the frame, at least one ski disposed on the frame, a seat disposed on the frame, a steering device disposed on the frame forward of the seat that is operatively connected to the at least one ski for steering the snowmobile, and a novel...http://www.google.com.au/patents/US6973988?utm_source=gb-gplus-sharePatent US6973988 - Long track mountain snowmobile and a track therefor
