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Fitting Pistons

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  1. Check piston-to-bore clearance. See PISTONS PINS & RINGS  table under ENGINE SPECIFICATIONS. Standard size pistons are color-coded Red, Blue or Yellow on the piston dome. See PISTONS PINS & RINGS  table under ENGINE SPECIFICATIONS. Oversize pistons are also available.
  2. If bore diameter is in lower one-third of specification, use a Red coded piston. If bore diameter is in middle one-third of specification, use a Blue coded piston. If bore diameter is in upper one-third of specification, use Yellow coded piston. Use proper size piston to obtain specified clearance. See PISTONS PINS & RINGS  table under ENGINE SPECIFICATIONS.