Piston Rings Stroke 4,250" Bore 3,528" (89,6112 mm ) Compression rings: 4 -

Piston Rings Stroke 4,250" Bore 3,528" (89,6112 mm ) Compression rings: 4 - 1/16, oil segment: 2 - 5/32 9.5:1 +.030 mm Cast Iron 1340 ccm (80 cui)