Showing specs for all NA & NB Miatas

Piston pin hole diameter (NA8)

Diameter: 0.7870—0.7874 in (19.988—20.000 mm)Diameter: 19.988—20.000mm {0.7870—0.7874 in}

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Measure in X and Y directions at four specified points.

Applies to
  • NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual