2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 168Get this manual
Engine Mechanical: Tighten the cylinder head cover bolts in diagonal stages to the specified torqueTightening torque Cylinder head cover bolt: 14 Nm (1.4 kgf-m, 10.0 lb-ft)
Automatic decompression Move the automatic decompression weight by hand to inspect if it is operating smoothlyIf the automatic decompression weight does not operate smoothly, replace it with new one
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Valve Clearance Inspection and Adjustment
Refer to "Valve Clearance Inspection and Adjustment in Section 0B (Page 0B-5)"
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Cam wear Check the camshaft for wear or damageMeasure the cam height "a" with micrometerReplace camshaft if the cams are worn to the service limitSpecial tool0990020202 (Micrometer (1100 mm, 25 50 mm)) Cam height "a" Service limit (IN: 35.890 mm (1.4130 in) Service limit (EX: 34.620 mm (1.3630 in)