Mainshaft Inspection

WARNING: This page is about a different variant/trim than selected.

Inspect the oil passage, gear, and bearing contact areas for wear and damage, then measure the mainshaft at points A, B, C, D, E, and F. If any part of the mainshaft is less than the service limit, replace it.
Standard:
1. Ball Bearing Contact Area (Transmission Housing Side): 38.984- 39.000 mm (1.53480- 1.53543 in)
2. 6th Gear Distance Collar Contact Area: 38.984- 39.000 mm (1.53480- 1.53543 in)
3. 4th/5th Gear Distance Collar Contact Area: 41.984- 42.000 mm (1.65291- 1.65354 in)
4. Needle Bearing Contact Area: 47.984- 48.000 mm (1.88913- 1.88976 in)
5. Ball Bearing Contact Area (Clutch Housing Side): 28.002- 28.015 mm (1.10244- 1.10295 in)
6. Pilot Bearing Contact Area: 19.967- 19.980 mm (0.78610- 0.78661 in)
Service Limit:
1. 38.93 mm (1.5327 in)
2. 38.93 mm (1.5327 in)
3. 41.93 mm (1.6508 in)
4. 47.93 mm (1.8870 in)
5. 27.95 mm (1.1004 in)
6. 19.91 mm (0.7839 in)
  
  Fig 1: Identifying Points On Mainshaft From Where Its To Be Check For Service Limit
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Inspect the runout by supporting both ends of the mainshaft. Then rotate the mainshaft two complete turns while measuring with a dial gauge. If the runout exceeds the service limit, replace the mainshaft.
Standard: 0.02- mm (0.0008 in) max.

Service Limit: 0.05 mm (0.0020 in)

Fig 2: Measuring Mainshaft Runout Using Dial Gauge
Courtesy of AMERICAN HONDA MOTOR CO., INC.