6. CYLINDER HEAD/VALVES DINK50/ 125 SPECIFICATIONS(DINK 50) Unit: mm Standard (mm) Service Limit (mm) Item 50cc 50cc IN 0.04 Valve clearance (cold) EX 0.04 Cylinder head compression pressure 14(kg/cm) Cylinder head warpage IN 25.7611 25.3 Camshaft cam height EX 25.5628 25.2 IN 10.000-10.015 10.10 Valve rocker arm I.D. EX 10.00-10.015 10.10 Valve rocker arm shaft IN 9.972-9.987 9.91 O.D. EX 9.972-9.987 9.91 IN 1.0 1.8 Valve seat width EX 1.0 1.8 IN 4.475-4.490 4.4 Valve stem O.D. EX 4.475-4.490 4.4 IN 4.500-4.512 4.580 Valve guide I.D. EX 4.500-4.512 4.580 Valve stem-to-guide IN 0.10-0.037 0.08 clearance EX 0.030-0.057 0.10 6-4