Suzuki SY413 Service Manual page 2910

6A3-2 ENGINE MECHANICAL (J18 TYPE ENGINE)
ENGINE
The engine is a water-cooled, in line 4 cylinders, 4
stroke cycle gasoline unit with its DOHC (Double
overhead camshaft) valve mechanism arranged for
"V" type valve configuration consisting of 16 valves (2
each for intake and exhaust per cylinder).
GENERAL DESCRIPTION
The double overhead camshaft is mounted over the
cylinder head; it is driven from crankshaft through tim-
ing chains, and no push rods are provided in the valve
train system.