Valve, Intake/Exhaust

Valves

Valve Crown Diameter (A)
Inlet 31.00 ± 0.15 mm
Exhaust 27.00 ± 0.15 mm

Valve Stem Diameter (B)
Inlet (early versions) 6.970 +0/-0.015mm
Inlet (late versions) 5.970 +0/-0.015mm

Valve Stem Diameter (B1/B2)
Exhaust (early versions)
H1 = 22.7 mm B1 = 6,962 ± 0.007 mm
H2 = 65.1 mm B2 = 6,954 ± 0.007 mm

Exhaust (late versions)
H1 = 22.7 mm B1 = 5,962 ± 0.007 mm
H2 = 65.1 mm B2 = 5954 ± 0.007 mm

Total Valve Length (C)







Inlet 102.00 ± 0.07 mm
Exhaust 101.05 ± 0.07 mm

Disc Edge Height (D)
Inlet and exhaust 1.50 mm
Minimum height after grinding 1.20 mm

Valve Angle
Inlet and exhaust 44.5 degree

Valve Stem Vertical Position







Valve stem height 48.4 ± 0.5 mm
Maximum machining of the valve stem 0.5 mm







Valve Seats
Upper reduction angle (A)
Inlet 20 degree
Exhaust 15 degree

Matching surface angle (B)
Inlet and exhaust 45 degree

Lower reduction angle (C)
Inlet and exhaust 60 degree

Valve seat, width (a)
Inlet 1.4-1.8 mm
Exhaust 1.8-2.2 mm

Valve Lifters







Valve Lifters, Dimensions
External diameter (A) 32.000 +0.025/- 0.041 mm
External height (B) 26.0 ± 0.5 mm

Solid valve lifter shaft length (C)
15.96 mm at 0.02 mm intervals up to 16.16 mm. The dimensions are listed on the inside of each valve lifter.

Valve Springs
Length 45.1 +1.5/-0.5 mm
Type Conical

Valve Guides







Clearance Between New Components:
Inlet and exhaust 0.03-0.06 mm

Maximum Play For Used Components:
Inlet and exhaust 0.15 mm