Engine Specifications  

Rated Horsepower 24.03 SAE                                                                                   Brake Horsepower 40 HP at 2200 rpm                                                                     Firing Order 1-2-4-3                                                                                       Compression Ratio: 4.11:1                                                                                         Piston Displacement 200.5 cubic inches                                                                  Bore 3.876"                                                                                                               Stroke 4.250"                                                                                                          Torque 128 foot pounds at 1000 rpm                                                                      Cylinder Offset from Crankshaft Centerline 1/8" Crankshaft to Camshaft Centerline 4.155" 

Cylinder Head Specifications  

1928 Head 4.3:1 compression ratio, 47.3 HP, 242cc displacement. Compression in individual cylinders: 80, 85, 83, 82 PSI                                                                       1930 Head 4.1:1 compression ratio, 44.3 HP, 258cc displacement. Compression in individual cylinders: 77, 79, 82, 79 PSI                                                                    Normal Listed Compression A6050A, 75 pounds; A6050B, 110 pounds; B6050, 90 pounds                                                                                                                        Head Nut Torque 50 foot pounds 

600W Oil Usage Specifications  

Transmission 1 pint                                                                                                       Rear End 1-1/2 Quarts                                                                                              7-tooth Steering Box 7-3/4 ounces                                                                          2-tooth Steering Box 4-1/2 ounces