3.29 Drive Sprockets Brand: Scorpion Part Number: 043877 Notes: Replacement Drive Sprockets for the Scorpion Sled that used 3.29 pitch sprockets with a 1" drive shaft. These are new black plastic replacements and not old stock. These also fit many other model sleds that take 3.29 pitch sprockets with a 1" drive shaft. Price: $55.00