Wrist Pin - Honda GX 120 Tech Manual

2. Middle ring: Oil scraper ring installed with "N" or "T" on rail up. Thai rings are marked R. No expander under
ring.
3. 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. Piston weight: 106 grams minimum.
E. Total Piston weight: With rings, pin, and clips - 119 grams minimum.
F. Total Piston weight with rings, retainers, complete with rod, pins and bolts 263 grams minimum.
G. See drawing for dimensions
OLD STYLE
RINGS
A. Must be stock Honda rings with stock size and configuration. Compression and scraper rings may not be
collapsed in grove.
B. No decreasing of ring tension by heating, machining or any other means.
F. Ring thickness:
OLD STYLE:
Compression: 0.056"min.
Scraper:
Oil Ring: 3 piece lower 0.095"min. 1 piece 0.097" min.

WRIST PIN

Stock Honda wrist pin and retainer
OD:
Length:
ID:
Weight:
Compression: 0.036" min.
0.056" min.
0.511 ref. +/-
1.854" + 0.010"
0.354"
23 grams minimum
TIER III
TIER III:
Scraper: 0.036" min.
14