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Valve Spring

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Free length (reference) mm (in) Standard 42.64 (1.6787)
Tension/spring height N (kgf, lb)/mm (in) Set Standard 182 - 210 (18.56 - 21.41, 40.92 - 47.22)/33.0 (1.2992)
Lift Standard 475 - 525 (48.43 - 53.53, 106.80 - 118.04)/22.0 (0.8661)
Squareness (at height of 30 mm (1.1811 in)) Standard 2.5 °, 1.4 mm (0.0551 in) or less