ENGINE
Bore and stroke 55.0 x 42.0 mm, 2.17 x 1.65 in.
Displacement 399 cu. cm, 24.3 cu in.
Compression ratio 11.5:1
Valve train Gear driven DOHC, 4 valves per cylinder
Intake valve opens at 1 mm lift 5 deg ATDC
Intake valve closes at 1 mm lift 33 deg ABDC
Exhaust valve opens at 1 mm lift 33 deg BBDC, 38 deg BBDC (California)
Exhaust valve closes at 1 mm lift 5 deg BTDC, 10 deg BTDC (California)
Lubrication system Forced pressure and wet sump
Cooling system Liquid cooling system with cooling fan
Air filtration Paper filter
Crankshaft type Unit-type, 6 main journals
Engine weight(dry) 57 kg, 126 lbs.
Firing order 1-2-4-3.
Cylinder arrangement Vertical 30 deg. in line four
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SPECIFICATIONS