Showing specs for all NA & NB Miatas

Crankshaft runout — maximum (NA6)

Runout: 0.0016 in (0.04 mm) max.Runout: 0.04 mm (0.0016 in) max.

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

Support the crankshaft on V-blocks and measure at the center journal; replace if necessary.

Applies to
  • NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.
  • Verified in: 1990 Mazda MX-5 Miata Workshop Manual