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Spark Plug NLEM0046 NGK Champion Type Standard BKR5E-11 RC10YC4 Hot BKR4E-11 — Cold BKR6E-11 — Plug gap mm (in) 1.0 - 1.1 (0.039 - 0.043) Cylinder Head NLEM0030 Unit: mm (in) Standard Limit Head surface flatness Less than 0.03 (0.0012) 0.1 (0.004) Height 117.8 - 118.0 (4.638 - 4.646) — Valve NLEM0031 VALVE NLEM0031S01 Unit: mm (in) SEM188A QG18DE Valve head diameter “D” Intake 29.9 - 30.2 (1.177 - 1.189) Exhaust 24.9 - 25.2 (0.980 - 0.992) Valve length “L” Intake 92.00 - 92.50 (3.6220 - 3.6417) Exhaust 92.37 - 92.87 (3.6366 - 3.6563) Valve stem diameter “d” Intake 5.465 - 5.480 (0.2152 - 0.2157) Exhaust 5.445 - 5.460 (0.2144 - 0.2150) Valve face angle “ α ” 45°15 ′ - 45°45 ′ Valve margin “T” 1 (0.04) Valve margin “T” limit More than 0.5 (0.020 in) Valve stem end surface grinding limit 0.2 (0.008) VALVE SPRING NLEM0031S02 Free height mm (in) 40.0 (1.575) Pressure N (kg, lb) Standard 370.0 (37.73, 83.19) at 23.64 (0.9307) Limit 347.8 (35.46, 78.19) at 23.64 (0.9307) Out-of-square mm (in) Less than 1.80 (0.0709) SERVICE DATA AND SPECIFICATIONS (SDS) QG Spark Plug EM-65 |