1978 Polaris RXL Service Manual, Page 50Get this manual
CLUTC TUNIN lCont) Ad justmen of ClutchBe lt Neu ral Pos itionThe distance be tween he be lt and the mova le sheave the rive clut ch is very cr iticalThis di stan ce controls the starting ratio (lowest sta rt ing ratio is preferable and lso controls he positi the cl utch we ight to engine RPMThe ist ance be tween he be lt and movab le sheave shou ld be ap pro xi mately .0 20"Fig3Th is ad justmen is con trolled by the se screws on the movab le face and the spacers under he sp iderThe rive clutch will be assembled wit .2 50" spacer, pa rt um be 50 10 139under the spide rThe thick ness an part num bers the add it ional spacers arc :
.2 70" .29 0" .3 10" .330"
5010 140 50 10 14 50 10 142 50 10 143