2005 Ski-Doo Racing Handbook, Page 122Get this manual
SECTION 04SUSPENSION SC-3 SC-4RAS
Here are some of the other highlights of this suspension: 1Total weight of SC IV is 1.36 KG (3 lbs) less than the SC-32Rails are 3mm (18") taller and slightly thicker for 26 decrease in vertical flex and 30 improvement in lateral flex
3Offset idler wheels on rail to reduce noise4Idler wheels are larger, 141mm versus 135mm due to increased rail height5Labyrinth seals on idler bearings to reduce risk of water infiltration6Smaller diameter idler wheel bearings used throughout7Rear axle and bearings are smaller diameter