The some of the cross country bike racers use foam to keep mud and such from building up in between the skid and motor.. :thumbsup:MONSTERMATT said:uh -huh thats what i run, i was washing the quad today and noticed the skids are workin well LOL i would ask this question to others, is it worth it too pack something between the bike and skid cuz i ride trails and i got so much crud buildin up in between the bike and the skidz