Piston – Wrist Pin And Piston Rings; Piston Notes - Honda GX160 Tech Manual

PISTON – WRIST PIN AND PISTON RINGS
Remove rod and piston – triangle or dot on top of piston must point toward push rods - piston, wrist pin
and rings must be absolutely stock and not altered in any manner.

PISTON NOTES

Piston will be stock Honda standard size and will not be altered in any way.
A. Oversized pistons must not be used.
B. All three piston rings must be used and installed properly.
1. Top ring: Chrome compression ring installed with "N" Thailand rings marked R on rail up. No expander
Under ring
2. Middle ring: Oil scraper ring installed with "N" or R on rail up. No expander under
ring.
2. Bottom ring: Three (3) piece oil rings are allowed. Check oil ring expander for alterations that will alter
ring tension (cutting ends of expander ect.)
C. Piston may not be knurled, grooved or coated
D. Total Piston weight: With rings, pin, and clips 200 grams minimum
E. Minimum total combined weight: 359 Grams = (Piston, rings, complete rod w/ bolts wrist pins
& retainers.)
F. See drawing for dimensions
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