Inspection Of Cylinder; Inspection Of Piston; Inspection Of Piston Pin/Ring; Inspection Of Crank Shaft - TGB Hornet 50 Service Manual

4-3-2 Inspection of Engine Components

5. Inspection of Cylinder:

A. Check if any damage appears on the bore.
B. Check if any damage or crack appear on surface.
C. Excessive carbon deposit in the air outlet has to be cleaned.
D. Replace if the cylinder bore exceeds 41.07mm. (50C.C) , 50.07 mm (90 C.C)
E. Repair will be needed if the flatness exceeds 0.1mm.
6. Inspection of Cylinder Head:
A. Inspect any crack or damage on surface.
B. Excessive carbon deposit in the combustion chamber has to be cleaned.
C. Repair will be needed if the flatness exceeds 0.1mm.
7. Inspection of Piston Pin:
A. Check for unusual damage, abrasion or color.
B. Replaced when the exterior diamemter is less than 9.98mm (50C.C),
11.98mm (90 C.C).

8. Inspection of Piston:

A. Check for unusual damage, crack or abrasion.
B. Measure the exterior diameter at 15m/m (50C.C), 20m/m (90C.C.)
height above the piston bottom and the perpendicular to the pin hole.
Replaced if it is less than 40.89mm. (50 C.C.) ,49.89 (90 C.C.)
C. Replaced when the piston pin hole exceeds 10.04mm (50.C.C),
12.04 mm (90 C.C.)
9. Inspection of Piston Ring:
A. Check for unusual abrasion, damage or carbon deposit.
B. Put the piston ring into the cylinder and measure the clearance of opening by
thickness gauge. Replaced if it exceeds 0.8mm.
C. Put the piston ring into the piston, press tightly and measure the clearance
between piston ring and the groove with thickness gage.
Replaced if it exceeds the limit of 0.02 ¡ ã

10. Inspection of Crank Shaft:

A. Check for unusual abrasion and damage from the appearance.
B. Support the two bearings of crank shaft with V-shaped blocks and measure
the deflection of two ends by indicator guage. Replaced if it exceeds 0.08mm.
0.07mm.
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