Exploded View

Fig 1: Exploded View Of Mainshaft Assembly Components With Torque Specifications

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE: Refer to the EXPLODED VIEW as needed during the following procedure.

Remove the 42 x 63.5 x 3.5 mm thrust needle bearing (A), 3rd gear (B), the 42 x 49 x 23 mm needle bearing (C), and the 47 x 64 x 3 mm thrust needle bearing (D) from the mainshaft (E).

Fig 2: Identifying Thrust Needle Bearing, 3rd Gear And Needle Bearing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the set ring (F) and the 32 x 40 x 23 mm needle bearing (G).
Place 4th gear (A) on press bases (B), and place a spacer (C) between the mainshaft (D) and a press to prevent damaging the mainshaft.

Fig 3: Placing Spacer Between Mainshaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the 3rd gear collar (A), the 3rd/6th clutch (B), 6th gear (C), and 4th gear (D) using the press.

Fig 4: Removing 3rd Gear Collar, 3rd/6th Clutch, 6th Gear And 4th Gear Using Press
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the O-rings (A) from the mainshaft (B).

Fig 5: Removing O-Rings From Mainshaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the sealing rings (C) from the mainshaft.
Inspect the bearings for galling and rough movement.
Inspect the shaft bearing surfaces for scoring and excessive wear, and inspect the shaft splines for excessive wear and damage.
Inspect 3rd gear, 4th gear, and 6th gear for wear and damage, and inspect the 6th gear bearing for wear and rough rotation.