Crankshaft

Revision as of 18:08, 17 May 2008; view current revision
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The crankshaft is interchangeable between early A12, A12GX, late A12, late A13 and A12A. Only the flywheel bolts differ, after 1974 using metric bolts.

Stroke:

• 70mm (2.76 in.) stroke: A12/A12A/A13(1980)
• 77mm (3.03 in.) stroke: A13(1974)/A14
• 82mm (3.23 in.) stroke: A15

• Twin-carb engine (A12GX, A12T and A14T) crankshafts are the same as a standard engines.
• 1974-up cranks use metric flywheel bolts. Early engines used British threads. See A Engine Redesign
• Front bolt, that holds the front pulley on, is:
  • Part Number: 12309-78200 ($4.58)
  • M16 x 1.50 (fine) pitch
  • 15mm diameter
  • 27mm long
  • The head is ?mm hex and about 15 mm thick.
  • Torque specification: 15-16 kg/m (108-116 ft. lb.)

Part Numbers

• 12200-H8500 CRANKSHAFT ASSY B310 A12S, A13S
• 12200-H8515 A12/A12A CRANKSHAFT 70mm/2.76" stroke
• 12200-H5720 A12 COMPETITION CRANKSHAFT 70mm/2.76" stroke
• 12200-H8915 A13/A14 CRANKSHAFT 77mm/3.03" stroke
• 12200-G3400 A15 CRANKSHAFT 82mm/3.23" stroke

Old Numbers:

• 12200-H1000 ASSY-CRANKSHAFT 1 A12 MANUAL - $624.02
• 12200-H1001 CRANKSHAFT 1 A12 -671 12 12200-H1000 superceded
• 12200-H1000 CRANKSHAFT 1 A12 0671- 2 12200-H1001 superceded
• 12200-H5000 CRANKSHAFT 1 A12 0572- 2 12200-H1000 $624.02

BEARING SET

• 12212-H1000 SET-BEARING US 1.00MM 1 A12 -
• 12207-M7201 SET-BEARING STD 1 A12 - 12207-H1000 $71.58
• 12207-H1000 SET-BEARING STD 1 A12 -
• 12208-H1000 SET-BEARING US 0.20MM 1 A12 -
• 12209-H1000 SET-BEARING US 0.25MM 1 A12 -
• 12210-H1000 SET-BEARING US 0.50MM 1 A12 -
• 12211-H1000 SET-BEARING US 0.75MM 1 A12 -

MAIN BEARING (#1/#5, SHELL THICKNESS)
4 each required

• 12215-H2310 .0720"
• 12215-H2311 .0718"
• 12215-H2312 .0715"

MAIN BEARING (#2/#4, SHELL THICKNESS)
4 each required

• 12231-H2310 .0720"
• 12231-H2311 .0718"
• 12231-12312 .0715"

MAIN BEARING (CENTER, SHELL THICKNESS)
2 required

• 12247-H2310 .0720"
• 12247-H2311 .0718"
• 12247-H2312 .0715"

SEAL, Front

• 13042-18000 SEAL-OIL CRANKSHAFT FRONT 1 A12 - superceded
• 13510-H1000 SEAL-OIL CRANKSHAFT FRONT (NOK) 1 A12 0271- 2 13042-18000 $7.24

SEAL, Rear

• 12279-18000 SEAL-OIL CRANKSHAFT REAR 1 A12 - $81.18
• 12279-18010 SEAL-OIL CRANKSHAFT REAR (NDK) 1 A12 0271- 2 12279-18000 NLA
• 12279-H1000 SEAL-OIL CRANKSHAFT REAR (NOK) 1 A12 0271- $81.18

PILOT BUSHING

• 32202-18000 BUSHING-PILOT 1 A12 MANUAL - $3.98

SLINGER

• 12302-18000 THROWER-OIL CRANKSHAFT 1 A12 - $1.57

PULLEY

• 12316-30000 KEY-WOODLUF 5X16 2 A12 - $1.13
• 12303-H1001 PULLEY-CRANKSHAFT 1 A12 0272- 0 12303-18002 $37.66
• 12303-18002 PULLEY-CRANKSHAFT 1 A12 - superceded
• 12308-H1000 WASHER-PULLEY BOLT 1 A12 - $1.29
• 12309-78200 BOLT-CRANK PULLEY 1 A12 - $5.73

FLYWHEEL BOLTS

• 12315-H1001 BOLT-FLY WHEEL 6 A12 MANUAL - $4.38
• 12315-H1000 BOLT-FLY WHEEL 6 A12 AUTOMATIC - $3.51
• 12330-20300 PILOT-CONVERTER 1 A12 AUTOMATIC - $18.66
• 12333-20300 PLATE-CRANK CONVERTER 1 A12 AUTOMATIC - $9.44