General Engine Specifications

General Specifications

Bore 86.7mm (3.4133 inch)
Stroke 75 mm (2.9528 inch)
Piston
Diameter (Standard) 86.68 - 86.71 mm (3.413 - 3.414 inch)
Clearance (Piston-to-cylinder) 0.01 - 0.03 mm (0.0004 - 0.0012 inch)
Ring groove width
No. 1 1.230 - 1.250 mm (0.0484 - 0.0492 inch)
No. 2 1.220 - 1.240 mm (0.0480 - 0.0488 inch)
Oil 2.515 - 2.535 mm (0.0990 - 0.0998 inch)
Piston for service 0.25 mm (0.010 inch), 0.50 mm (0.020 inch)

Piston Ring
Number of rings per piston 3
Compression ring 2
Oil ring 1
Compression ring type
No.1 Inner bevel type
No.2 Under cut type
Oil ring type 3-piece type

Ring end gap
No.1
Specification 0.20 - 0.35 mm (0.0079 - 0.0138 inch)
Limit 0.8 mm (0.031 inch)
No.2
Specification 0.37 - 0.52 mm (0.0146 - 0.0205 inch)
Limit 0.8 mm (0.031 inch)
Oil ring side rail
Specifications 0.2 - 0.7 mm (0.0079 - 0.0276 inch)
Limit 1.0 mm (0.039 inch)
Ring side clearance
No.1
Specification 0.04 - 0.08 mm (0.0016 - 0.0031 inch)
Limit 0.1 mm (0.004 inch)
No.2
Specification 0.03 - 0.07 mm (0.0012 - 0.0028 inch)
Limit 0.1 mm (0.004 inch)
Rings for service 0.25 mm (0.010 inch), 0.50 mm (0.020 inch)

Connecting Rod
Piston pin installation force 2,450 - 12,255 N (250 - 1,250 kg, 551 - 2,755 lbs.)
Connecting rod side clearance (big end)
Specification 0.10 - 0.25 mm (0.0039 - 0.0098 inch)
Limit 0.4 mm (0.016 inch)
Bend 0.05 mm or less/100 mm (0.0020 inch or less/3.937 inch)

Bearing oil clearance
Specification 0.018 - 0.036 mm (0.0007 - 0.0014 inch)
Limit 0.1 mm (0.004 inch)

Crankshaft
Journal O.D. 61.982 - 62.000 mm (2.4402 - 2.4409 inch)
Pin O.D. 47.982 - 48.000 mm (1.8891 - 1.8898 inch)
Out-of-round of journal and pin Maximum 0.003 mm (0.00012 inch)
Taper of journal and pin Maximum 0.005 mm (0.00020 inch)
End play
Specification 0.070 - 0.250 mm (0.0028 - 0.0098 inch)
Limit 0.4 mm (0.016 inch)
Main bearing oil clearance
Specification 0.004 - 0.022 mm (0.0002 - 0.0009 inch)
Limit 0.1 mm (0.004 inch)
Cylinder bore 86.7 mm (3.4134 inch)
Flatness of gasket surface
Specification Maximum 0.03 mm (0.0012 inch)
Limit 0.05 mm (0.002 inch)
Out-of-round of cylinder bore Maximum 0.02 mm (0.0008 inch)