A snowmobile includes a chassis having a generally reduced length and a snow flap pivotally attached to the rear portion of the chassis, above the track system. The track system extends rearwardly beyond the chassis, and the snow flap shields the track system above and behind from spraying snow. The...http://www.google.com.au/patents/US6491125?utm_source=gb-gplus-sharePatent US6491125 - Snowmobile with pivotable rear snow flap
