TGB Hornet 50, Руководство по обслуживанию, Страница: 27 / 86

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3-2 ENGINE
3-2-1 Combustion & Air Inlet-Outlet System
I . Combustion System
A. Cylinder Head: made of aluminum alloy.
the combustion chamber.
B. Spark Plug: NGK BPR7HS
（
for 50C.C.
）
,BPR7HS-10
（
for 90C.C.
）
.
C. Cylinder: made of cast iron, with one exhaust port and five scavenging ports.
D. Piston: made of high silicon aluminum alloy.
E. Piston Ring: including first and second rings, and the expander ring
installed in the inner side of 2nd ring.
(FOR 50C.C.)
Two Piston Rings
(FOR 90C.C.)
F. Con-Rod: with needle bearing on both big end and small end.
G. Bearing: with a ball bearing on each left and right rand side.
2. Air In-Take & Exhaust System
A. Air Filter: with pre-filter and filter to eliminate dust and dirt.
B. Carburetor: VM16 Auto-Choke type.
C. Reed Valve: with steel single reed and locked into the inner side of air in- take pipe.
D. Crank Case: made of aluminum alloy.
E. Muffler: with sound-absorbed fiber glass and expansion chamber.