No Slip Drive Sprockets from Wahl Brothers Racing are designed specifically for less rotating mass. The No Slip Sprockets drive off of four track lugs and track clips at once with one pair. Eliminate those extra involutes with these sprockets. Rail tips may need to be shortened in some cases. Be sure to check for clearance. It is recommended that the skid frame be installed without the springs and cycled to check rail tip clearance. 1-1/16 - 1-1/8 fits all Arctic Cat (except any with Diamond Drive, King Kat 04 and Mountain Cat 800/900 03-04), Polaris Edge, Ski Doo ZX and REV Chassis pre 08, Yamaha V-Max 4 92-97, V-Max, Mountain Max 95-03, All current Apex and RX-1 models.