ENGINE SPECIFICATIONS Standard
Item Valve springs Free length Intake Exhaust Installed length (valve closed) Intake Exhaust Compressed spring force (installed) Intake Exhaust Spring tilt
SPEC Limit
37.30 mm 37.30 mm
35.40 mm 35.40 mm
25.77mm 25.77mm
… …
147±11N (15.0 ± 1.1 kgf/mm) 147±11N (15.0 ± 1.1 kgf/mm)
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Intake Exhaust Winding direction (top view) Intake Exhaust
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2.5°/1.6 mm 2.5°/1.6 mm
Clockwise Clockwise
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Valve seat reformed
Yes
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Forward inclined single cylinder 51.5 × 60mm 9.8 ± 0.4:1 51.49~51.53 mm … …
… … … … 0.05 mm 0.05 mm
Cylinder Cylinder arrangement Bore × stroke Compression ratio Bore Max. taper Max. out-of-round
2-6