H0456B80L, H0456H80L, H0456H81M, H0457B80L, H0457B81M, H0457H80L, H0457H81M, H0459H80J 1980,1981 SPECIAL TOOLS - TUNE-UP Parts on group SPECIAL TOOLS - TUNE-UP: Pos. Part No Qty Parts name Comments  . FT2910 [0] KNOCK-OFF NUT TO REMOVE FLYWHEEL  . FTA2937-1 [0] TIMING TOOL TO ADJUST SPARK ADVANCE Parts catalog : SPECIAL TOOLS - TEST EQUIPMENT SPECIAL TOOLS - REPAIR DECALS - ENGINE COVERS SPECIAL TOOLS - POWER HEAD SPECIAL TOOLS - MANUAL STARTER SPECIAL TOOLS - LUBRICANTS AND SEALANTS SPECIAL TOOLS - LOWER UNIT