Showing specs for all NA & NB Miatas

Camshaft lobe height — standard and minimum (NA6)

Height Standard IN: 1.6098 in (40.888 mm) EX: 1.6098 in (40.889 mm) Minimum IN: 1.6019 in (40.688 mm) EX: 1.6019 in (40.689 mm)Height Standard IN: 40.888 mm (1.6098 in) EX: 40.889 mm (1.6098 in) Minimum IN: 40.688 mm (1.6019 in) EX: 40.689 mm (1.6019 in)

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

Measure each cam lobe at the factory-indicated two points; keep intake and exhaust values separate.

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