1978 Polaris RXL Service Manual, Page 63Get this manual
JAC KSHAFT REMO VAL ND IN STA LLATI ON (Con't,1 Install he ch aincase to he chassis with th jackshaftDo no install the sprocketsAlignment tool (Part No28703 99) shown prior installationInstall he lignme nt to ol to th jacksh aftor quing th ca screw to 5'; ft.ll bsInstall flan qette int the left bea ri ng support holeThe shaft should cente in th flangetteIf ectthe chaincase will have to be shimmed between the unne nd case acco rdi nglyusing shim kit (Part No22001 26) as needed to positio the shaft on center