2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 29Get this manual

2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 29

ENGINE SPECIFICATIONS Item Valve spring Free length IN EX Set length (valve closed) IN EX Compressed pressure (installed) IN EX Tilt limit IN EX Standard 37.03 mm (1.46 in) 37.68 mm (1.48 in) 27.87 mm (1.10 in) 27.38 mm (1.08 in) 111.3127.9 (11.3513.04 kg, 25.0228.75 lb) 127.4146.4 (12.9914.93 kg, 28.6432.91 lb) -

Limit 35.17 mm (1.38 in) 35.79 mm (1.41 in) 2.51.61 mm (2.50.063 in) 2.51.65 mm (2.50.065 in)

Direction of winding (top view)

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