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O.S. IL-300 DIA-STAR
PHOTOS BY CLARENCE LEE & HOPE McCALL ENGINEREVIEW This impressive 4-cylinder, in-line, 4-stroke helps O.S. celebrate its 70th anniversary Single, one-piece camshaft used with drive gear machined as part of the camshaft. Piston, wristpin and rod assembly. A single expansion-type ring is used. Con-rod with automotive-type split big end machined from bar stock bronze. Strictly jewelry quality. Note the lubrication holes in both the top and bottom of the rod bearing surface. AUTHOR'S NOTE: I...
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