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together by a necked capscrew. Threads on this capscrew are 1in.-17 by 1.06 in. long. The neck is 0.9-in. diameter by 4.25 in. long. Locking is by means of a pin through the crankcheek and threaded end of the capscrew.

Steel counterweights attached by means of rivets are used. It will be

noted that no vibration damping provisions are made.

Main bearings of NSK manufacturer are used as follows: rear, sixteen 18x18-mm. rollers, 3.54 in. ID by 6.3 in. OD by 1.14 in. wide; center, 23 balls, 8.5 in. ID by 11.1 in. OD by 0.94 in. wide, symbol 8075GA; front, 19 17x17-

mm. rollers, 3.9 in. ID by 6.7 in. OD by 1.06 in. wide outer race and 1.18 in. wide inner race, symbol 8692HA. Inner races of both front and rear bearings are conventional two piece construction. The fourth main bearing is the same size as the rear bearing except that the inner race is integral with the hub of the reduction driving gear. The outer race is positioned by the bearing ring flange and a steel snap ring. This bearing carries symbol 8708HA. Unfortunately, the symbol on the rear bearing was partially destroyed by fracture of the bearing race. Center main bearing mounting on the crankshaft is accomplished by means of a split T-section ring. The halves of this ring are attached from

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