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Piston Rings

  1. Using inverted piston, push NEW piston ring into cylinder bore 0.6-0.8" (15-20 mm) from bottom. Measure piston ring end gap. Repeat for each ring. See PISTONS, PINS & RINGS  under ENGINE SPECIFICATIONS.
  2. Clean piston ring grooves thoroughly. Install piston rings with identification mark toward top of piston. Using a feeler gauge, measure piston ring side clearance between ring and ring land.
  3. If ring lands are excessively worn, replace piston. See PISTONS, PINS & RINGS  under ENGINE SPECIFICATIONS. Align piston ring end gaps properly on piston. See Fig 1.
Fig 1: Installing Piston Rings
G96I07963Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE: A number indicating connecting rod bore is stamped on side of each connecting rod and cap. Connecting rod journal diameter codes (letters) are stamped on crankshaft counterweight pads. See Figure. Use both codes when ordering replacement bearings.
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