Cranks

Crankshaft I.D. chart (casting or stamped numbers)

22A62/62	Early 850 with oil feed for primary gear, 1.375" tail 	850cc

22A298		Early 850 thin nose crank, 1.375" diameter tail 	850cc

12A670		850 crank with 1.5" diameter tail			850cc

12A298									997cc

12A375		Oil feed hole for primary gear 				997cc

12A595		Early crankshaft casting				998cc

12A1454		Later specefication casting				998cc

BHM1436A+ 	1985 on (12A1451 casting				998cc

12G82									1100cc

AEG330		EN40B not cross drilled					970cc

AEG171		EN40B not cross drilled					1070cc

12G1287/8	EN16 1.625" con rod journal				1275cc not `S`

12G1505		EN16 1.75" con rod journal				1275cc not `S`	

12G1683		12G1505 casting tuftrided 1.75" con rod journal		1275cc not `S`

CAM6232		Rolled fillet radius on bearing journals, A+, 1.75"	1275cc not `S`

AEG315/6	EN40B not cross drilled, nitrided, 1.625"		1275 Cooper `S`

AEG479/480	EN40B cross drilled, nitrided, 1.625"			1275 Cooper `S`

AEG623		EN16 tuftrided 1.625" con rod journal			1275 Cooper `S`