Yamaha YZF-R1B 2012 Service Manual

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Contents

ENGINE SPECIFICATIONS2-4Timing chainTensioning system AutomaticValve, valve seat, valve guideValve clearance (cold)Intake 0.11–0.20 mm (0.0043–0.0079 in)Exhaust 0.23–0.27 mm (0.0091–0.0106 in)Valve dimensionsValve head diameter A (intake) 30.90–31.10 mm (1.2165–1.2244 in)Valve head diameter A (exhaust) 24.90–25.10 mm (0.9803–0.9882 in)Valve face width B (intake) 1.200–2.475 mm (0.0472–0.0974 in)Valve face width B (exhaust) 1.625–2.900 mm (0.0640–0.1142 in)Valve seat width C (intake) 0.90–1.10 mm (0.0354–0.0433 in)Limit 1.60 mm (0.06 in)Valve seat width C (exhaust) 1.10–1.30 mm (0.0433–0.0512 in)Limit 1.80 mm (0.07 in)Valve margin thickness D (intake) 1.35–1.75 mm (0.0532–0.0689 in)Valve margin thickness D (exhaust) 0.50–0.90 mm (0.0197–0.0354 in)Valve stem diameter (intake) 4.975–4.990 mm (0.1959–0.1965 in)Limit 4.960 mm (0.1953 in)Valve stem diameter (exhaust) 4.460–4.475 mm (0.1756–0.1762 in)Limit 4.425 mm (0.1742 in)Valve guide inside diameter (intake) 5.000–5.012 mm (0.1969–0.1973 in)Limit 5.050 mm (0.1988 in)Valve guide inside diameter (exhaust) 4.500–4.512 mm (0.1772–0.1776 in)Limit 4.550 mm (0.1791 in)Valve-stem-to-valve-guide clearance (intake) 0.010–0.037 mm (0.0004–0.0015 in)Limit 0.080 mm (0.0032 in)Valve-stem-to-valve-guide clearance (exhaust) 0.025–0.052 mm (0.0010–0.0020 in)Limit 0.100 mm (0.0039 in)Valve stem runout limit 0.010 mm (0.0004 in)Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk