4-4 CONNECTING ROD and PISTON
The connectingrod is forged of aluminumalloy,
0 which itself serves as bearings at 'both the large and small ends.
The pistonis cast of aluminum alloy, and has grooves for receiving two compression rings and one oil ring. (See Fig. 5 . )
4-5 CAMSHAFT
The camshafts are integrally built with a cam gear of special cast iron, and have intake and exhaust cams. Also the camshafts have aluminum plain bearing attached to bothends. (No ball bearing is used.)
(See Fig. 6.)
I
Top R i n g
Second Ring
Oil R i n g
C o n n e c t i n g R o d
Fig. 5
4-6 VALVEARRANGEMENT
The exhaust valve is located upstream of the cooling air with the result that the exhaustvalve is intensive- ly cooled for improved engine durability. The inner sideof the valve head is reinforcedwithhardalloy fused to it foradded durability. (See Fig. 7.)
2
| Fig..6 |
I | Exhaust Valve - |
DirecGon of Coolin'g W i n d
Fig. 7
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