1978 Polaris RXL Service Manual, Page 33Get this manual
CRAN KSHA FT RUN-QUT )
Chec king cra nks ha ft run-out is definite must when engines are disassembl ed and wh en new rankshafts are insta lled rebuil tCrankshafts ca be bent wisted du to slight blow, ou of balance cl ut ches, or even
by lo ing belt
Precisio equipment must be used to chec rank shaf tMost adequa tely equipped machine shops can do his jo b
Crank shafts mu st be set invee" block nd checked wit dia ind icator, at PTOat flywhee ndsand at he outboard main bea ringSee iagram