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Valve adjustment for 2002-2007 yamaha grizzly 660.
Inspection/adjustment for valves should be performed initial 20 hours or 200 miles(320) and every 1500 miles(2400).
This procedure should be performed on cold engine.
Valve clearance (cold) Intake 0.10-0.15 mm (0.004-0.006 in.) Exhaust 0.15-0.20 mm (0.006-0.008in.) this is according to Clymer service, repair and maintenance book.
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