Valve moving system of an overhead valve engine

Claim 1

An air-cooled overhead valve engine comprising: a cylinder head; a cylinder head cover removably attached to said cylinder head; an inlet valve; an exhaust valve; first and second push rods; a rocker arm chamber formed between said cylinder head and said cylinder head cover; first and second rocker arms having a tapered shape disposed in said rocker arm chamber, wherein said first rocker arm is coupled to said inlet valve and an upper end of said first push rod, and said second rocker arm is coupled to said exhaust valve and an upper end of said second push rod, wherein said inlet valve and said exhaust valve are inclined toward said upper end of said first and second push rods, and said push rods being disposed a distance from one another which is greater than a second distance between said valves, a pair of cams operatively connected to said push rods, a third distance between said cams being equal to the distance between said push rods; first and second knuckle type footing bolt means for supporting said first and second rocker arms, respectively; a pair of bosses for receiving a stem portion of said inlet and exhaust valve, said bosses being disposed above said footing bolts; a breather, disposed under said cylinder head cover and positioned laterally outside of said push rods within said rocker arm chamber; a combustion chamber disposed below said inlet and exhaust valve; and an ignition plug having a discharge electrode and a main body, said discharge electrode being disposed above said combustion chamber and opposite one of said push rods, and said main body projecting outwardly from said cylinder head.