1978 Polaris RXL Service Manual, Page 53Get this manual
DRIVEN CLU TCH ISASSE BLY and REASSEMBLY Rem ove he snap ring and washerRemove the helix, spring and keyThe correc tension th spring is 13 tu rn counterclock wise the movabl sheaveThe riven clutch hel ix (ramp) has fou (4) spring loca ions wh ich lso allow adju st men ts in th spec ified engine RPMTh product ion sen ing is in the No.2 holeIf he engine operat ing RPM is lower han he specified RPM, th driven clutch spri ng ca be placed in he No3 No ho lesCon verse lyi he eng ine operati ng RPM is higher than he specified RPM, he sp ring can be moved to the No.1 hol e