2004-2008 models:

Fig 1: Exploded View Of Mainshaft (2004-2008 Models)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Special Tools Required 

• Driver handle 07746-0030100
• Attachment, 30 mm I.D. 07746-0030300

1. Support 2nd gear (A) on steel blocks, then install the ball bearing (B) using the special tools and a press as shown.
   NOTE: The thin edge of the outer race faces 6th gear.
   Fig 2: Installing Ball Bearing

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
2. Install the 39 x 44 x 26 mm needle bearing, 6th gear, synchro ring, and synchro spring.
3. Install the 5th/6th synchro hub (A) and the sleeve (B) by aligning the stops (C).
   Fig 3: Installing 5th/6th Synchro Hub And Sleeve By Aligning Stops

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Press the 5th/6th synchro hub using the special tool as shown. After installing, check the operation of the 5th/6th synchro hub and sleeve.
   Fig 4: Pressing 5th/6th Synchro Hub

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
5. Install the synchro spring, synchro ring, 42 x 47 x 30.5 mm needle bearings, 5th gear, distance collar, and 4th gear.
6. 2000-2003 models: Install the double cone synchro (A) and synchro ring (B).
   Fig 5: Installing Double Cone Synchro And Synchro Ring (2000-2003 Models)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
7. 2004-2008 models: Install the synchro ring (A) and synchro spring (B).
   Fig 6: Installing Synchro Ring And Synchro Spring (2004-2008 Models)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
8. Install the 3rd/4th synchro hub (A) and the sleeve (B) by aligning the stops (C).
   Fig 7: Installing 3rd/4th Synchro Hub And Sleeve By Aligning Stops

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
9. Press the 3rd/4th synchro hub using the special tool as shown. After installing, check the operation of the 3rd/4th synchro hub and sleeve.
   Fig 8: Pressing 3rd/4th Synchro Hub

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10. 2000-2003 models: Install the synchro spring (A) and double cone synchro (B).
    Fig 9: Installing Synchro Spring And Double Cone Synchro (2000-2003 Models)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
11. 2004-2008 models: Install the synchro spring (A) and synchro ring (B).
    Fig 10: Installing Synchro Spring And Synchro Ring (2004-2008 Models)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. Install the distance collar (A), the 35 x 40 x 35 mm needle bearing (B), and 3rd gear (C).
    Fig 11: Installing Distance Collar, Needle Bearing And 3rd Gear

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
13. Install the angular ball bearing (A) with the thin edge of the outer race facing 3rd gear (B). Use the special tool and a press.
    Fig 12: Installing Angular Ball Bearing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.