Yamaha F4 Service Manual
Also see for F4: Owner's manualOwner's manualBrochure & specsOwner's manualOwner's manual
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2-3ESPEC MAINTENANCE SPECIFICATIONSMAINTENANCE SPECIFICATIONSPOWER UNITItem Unit ModelF4A/F4CYLINDER HEADWarpage limit mm (in) 0.1 (0.004)CYLINDERBore mm (in) 59.00~59.02 (2.323~2.324)Wear limit mm (in) 59.1 (2.33)Taper limit mm (in) 0.08 (0.003)Out of round limit mm (in) 0.05 (0.002)CAMSHAFTIntake (A) mm (in) 26.736~26.836 (1.0526~1.0565)Exhaust (A) mm (in) 26.532~26.623 (1.0442~1.0481)Intake (B) mm (in) 21.950~22.050 (0.8642~0.8681)Exhaust (B) mm (in) 21.950~22.050 (0.8642~0.8681)Camshaft diameter(journal) mm (in) 14.934~14.984 (0.5880~0.5899)Camshaft round limit mm (in) 0.03 (0.001)VALVE LIFTEROutside diameter mm (in) 7.965~7.980 (0.3136~0.3142)PUSH RODRunout limit mm (in) 0.5 (0.02)VALVESValve clearance (cold)Intake mm (in) 0.10 ± 0.02 (0.004 ± 0.0008)Exhaust mm (in) 0.10 ± 0.02 (0.004 ± 0.0008)Head diameter (A)Intake mm (in) 23.9~24.1 (0.94~0.95)Exhaust mm (in) 21.9~22.1 (0.86~0.87)Face width (B)Intake mm (in) 1.84~2.26 (0.072~0.089)Exhaust mm (in) 1.84~2.26 (0.072~0.089)Seat width (C)Intake mm (in) 0.6~0.8 (0.02~0.03)Exhaust mm (in) 0.6~0.8 (0.02~0.03)Margin thickness (D)Intake mm (in) 0.70 (0.028)Exhaust mm (in) 1.00 (0.039) |
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