Yamaha YZF-R1 (2006) [32/426] Engine specifications

ENGINE SPECIFICATIONS

2-3

Manufacturer/model NGK/CR9EK

Spark plug gap 0.6–0.7 mm (0.024–0.028 in)

Cylinder head

Volume 14.00–14.80 cm³ (0.85–0.90 cu.in)

Warpage limit* 0.10 mm (0.0039 in)

Camshaft

Drive system Chain drive (right)

Camshaft cap inside diameter 24.500–24.521 mm (0.9646–0.9654 in)

Camshaft journal diameter 24.459–24.472 mm (0.9630–0.9635 in)

Camshaft-journal-to-camshaft-cap clearance 0.028–0.062 mm (0.0011–0.0024 in)

Camshaft lobe dimensions

Intake A 34.450–34.550 mm (1.3563–1.3602 in)

Limit 34.350 mm (1.3524 in)

Intake B 25.170–25.270 mm (0.9909–0.9949 in)

Limit 25.070 mm (0.9870 in)

Exhaust A 33.550–33.650 mm (1.3209–1.3248 in)

Limit 33.450 mm (1.3169 in)

Exhaust B 25.192–25.292 mm (0.9918–0.9957 in)

Limit 25.092 mm (0.9879 in)

Camshaft runout limit 0.030 mm (0.0012 in)

Timing chain

Model/number of links RH2020/124

Tensioning system Automatic

Valve clearance (cold)

Intake 0.11–0.20 mm (0.0043–0.0079 in)

Exhaust 0.26–0.30 mm (0.0102–0.0118 in)

Valve dimensions

Valve 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)