Showing specs for all NA & NB Miatas

Crankshaft thrust bearing width by size (NA8)

Thrust bearing width Standard: 0.0985—0.1003 in (2.500—2.550 mm) 0.010 in (0.25 mm) oversize: 0.1034—0.1053 in (2.625—2.675 mm) 0.020 in (0.50 mm) oversize: 0.1083—0.1102 in (2.750—2.800 mm) 0.030 in (0.75 mm) oversize: 0.1132—0.1151 in (2.875—2.925 mm)Thrust bearing width Standard: 2.500—2.550mm {0.0985—0.1003 in} 0.25mm {0.010 in} oversize: 2.625—2.675mm {0.1034—0.1053 in} 0.50mm {0.020 in} oversize: 2.750—2.800mm {0.1083—0.1102 in} 0.75mm {0.030 in} oversize: 2.875—2.925mm {0.1132—0.1151 in}

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

Factory selection dimensions for correcting crankshaft end play; retain correct mating crankshaft dimensions.

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

Sources (1)

View 1 source citations
  • 1994 Mazda MX-5 Miata Workshop ManualTier 1
    Page B–63 (PDF p. 100) · Printed value & notes
    Page B–63 (PDF p. 100)
    Printed: “Thrust bearing width Standard: 2.500—2.550mm {0.0985—0.1003 in} 0.25mm {0.010 in} oversize: 2.625—2.675mm {0.1034—0.1053 in} 0.50mm {0.020 in} oversize: 2.750—2.800mm {0.1083—0.1102 in} 0.75mm {0.030 in} oversize: 2.875—2.925mm {0.1132—0.1151 in}”