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CYLINDER REBORING AND PISTON FITTING INFORMATION (Note: Dimensions given are standard size.)

Standard bore dimension of cylinder.

Side Valve Models (1935 and later) Side Valve Models (1935 and 1936, and all 80") Side Valve Models (1937 to 1948) Overhead Valve Models (1936 and later) Overhead Valve Models (1941 and later) 125 c.c. 165 c.c. yK^ and KH Models

Models (S and Hummer) Models (ST and STU)

2.745"

3.422"

3.3125"

3.3125"

3.4375"

2.0625"

2.375"

2.745"

All Models except 125 c.c. Models and 165 c.c. Models -piston should be fitted .001" to .002" clearance in cylinder, checking fit at bottom of skirt, front to rear.

125 c.c. Models -- piston should be fitted .003" to .004" clearance in cylinder, checking fit at bottom of skirt, front to rear. lf

165 c.c. Models -- piston should be fitted .0025 to .0035 clearance in cylinder, checking fit at bottom of skirt, front to rear.

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