Showing specs for all NA & NB Miatas

Mainshaft maximum runout (NA6 5MT)

Maximum 0.0012 in (0.03 mm)Maximum 0.03 mm (0.0012 in)

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

Measure mainshaft runout with a dial indicator as shown in the factory inspection figure; inspect shaft splines for wear or damage.

Applies to
  • NA 1990–1993 (B6, 5MT) — 1991–1993 inferred from 1990 factory evidence; actual-year verification is separate.
  • Verified in: 1990 Mazda MX-5 Miata Workshop Manual