1980-1981 Honda Odyssey FL250 Shop Manual, Page 38Get this manual
Quality of the image is intentionally reduced!
Check for carbon deposits
Piston Ring Gap Inspection
Standard Service limit
Top 0.0450.075 mm(0.0018 2nd 0.0250.050 mm(0.0010 (0.0035 0.09mm Top (0.0028 0.07 mm 2nd