Yamaha DRAG STAR XVS650 (1997) [130/360] Valves and valve springs

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VALVES AND VALVE SPRINGS 2 Replace Valve guide Replacement steps NOTE ________________________________ To ease guide removal installation and to maintain correct fit heat the cylinder head in an oven to 100 C Remove the valve guide using a valve guide remover Install the new valve guide using a valve guide remover 0 and valve guide installer 2 After installing the valve guide bore the valve guide using a valve guide reamer to obtain proper stem to guide clearance Valve guide remover installer 7 0 mm 0 28 in Remover YM 01225 A Reamer YM 0127 Installer YM 04017 90890 04018 NOTE ________________________________ After replacing the valve guide reface the valve seat 3 lnspect Valve face Pitting wear Grind the face Valve stem end Mushroom shape or diameter larger than the body of the stem Replace 4 Measure Margin thickness Out of specification Replace Margin thickness Intake 1 0 1 4 mm 0 039 0 055 in Limit 0 8 mm 0 031 in Exhaust 1 0 1 4 mm 0 039 0 055 in Limit 0 8 mm 0 031 in 4 23

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