general specifications 48-54

spec	E-EL	F-FL
engine type	61 C.I.OHV twin	74 c.i. OHV twin
cylinder bore	3-5/16	3-7/16
stroke	3-1/2	3-31/32
piston displacement	60.32	73.66
compression:low	E 6.5 to 1	F -6.6 to 1
compression: high	EL 7.0to1	FL-7.0 to 1
horse power *	8.77	9.44
wheelbase	59 1/2	59 1/2

* note: horsepower is N.A.C.C.. rating (estimated horsepower at 1000 rpm)

general specifications 55-65

spec	E-EL	F-FL
engine type	61 C.I.OHV twin	74 c.i. OHV twin
cylinder bore	3-5/16	3-7/16
stroke	3-1/2	3-31/32
piston displacement	60.32	73.66
compression:low	E-6.5 to 1	F-6.6 to 1
compression: high	EL-7.0to1	FL-7.0 to 1
horse power *	8.77	9.44
wheelbase	59 1/2	59 1/2

Model year specifications

48 models      49 models      50 models      51 models

52 models      53 models      54 models      55 models

56 models      57 models      58 models      59models

60 models      61 models      62 models      63 models

64 models      65 models