it seems the bikes share some parts with the hurricane of the same years, stock sprockets are 17 teeth in the front and 42 in the rear i just switched to 16 in the front and 44 inthe rear,havent had a chance to really test the difference yet but it seems to easily pull the front tire off the ground. dennis kirk catalog is where i found the parts and the cross reference and the original chain size is the same with this set up