Mainshaft Thrust Clearance Adjustment

Special Tools Required 

• Mainshaft Holder 07GAJ-PG20110
• Collar 07GAJ-PG20120
• Mainshaft Base 07GAJ-PG20130

1. Remove the 52 x 62 mm shim (A) and oil guide plate M from the transmission housing (B).
   Fig 1: Identifying Shim And Oil Guide Plate Of Transmission Housing

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
2. Thoroughly clean the 36 mm spring washer (A) and the 26 mm washer (B) before installing them on the clutch housing side ball bearing (C).
   NOTE: Be sure to install the spring washer in the direction shown.
   Fig 2: Identifying Spring Washer And Washer On Clutch Housing Side Ball Bearing

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Assemble all of the mainshaft components.
   NOTE: Refer to the EXPLODED VIEW , as needed, during the assembly.
4. Install the mainshaft assembly into the clutch housing.
5. Place the transmission housing over the mainshaft and onto the clutch housing.
6. Tighten the clutch and transmission housings with several 8 mm bolts.
   NOTE: It is not necessary to use sealing agent between the housings for this procedure.
7. Lightly tap on the mainshaft with a plastic hammer.
8. Attach the mainshaft holder (A), the collar (B), and the mainshaft base (C) to the mainshaft as follows:
   • Back out the mainshaft holder bolt (D), and loosen the two hex bolts (E).
   • Fit the mainshaft holder over the mainshaft so its lip is toward the transmission.
   • Align the mainshaft holder lip around the groove at the inside of the mainshaft splines, then tighten the hex bolts.
     Fig 3: Identifying Collar, Mainshaft Base Of Mainshaft And Mainshaft Holder With Bolt

     Courtesy of AMERICAN HONDA MOTOR CO., INC.
9. Fully seat the mainshaft by tapping its end with the plastic hammer.
10. Thread the mainshaft holder bolt in until it just contacts the wide surface of the mainshaft base.
11. Zero a dial gauge (A) on the end of the mainshaft.
    Fig 4: Turning Mainshaft Holder Bolt Clockwise

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. Turn the mainshaft holder bolt (B) clockwise; stop turning when the dial gauge has reached its maximum movement. The reading on the dial gauge is the amount of mainshaft thrust clearance.
    NOTE: Do not turn the mainshaft holder bolt more than 60 degrees after the needle of the dial gauge stops moving. Applying more pressure with the mainshaft holder bolt could damage the transmission.
13. If the reading is within the standard, the clearance is correct. If the reading is not within the standard, select the appropriate shim needed from the table, and recheck the thrust clearance.

    Standard: 0.11-0.18 mm (0.0043-0.0071 in) 

    (Example) 

    Measure reading: 1.93 mm (0.0760 in) 

    Subtract the total clearance measurement from the middle of the clearance standard 0.14 mm (0.0055 in).

    1.93-0.14 (0.0760-0.0055 in) = 1.79 mm (0.0705 in) 

    Select the shim closest to the amount calculated. For this example, the 1.78 mm (0.0701 in) shim is best.

14. With oil guide plate M and the appropriate size shim installed in the transmission housing, check the thrust clearance again to verify the clearance is within the standard.

    52 x 62 mm Shim 

    SHIM THICKNESS SPECIFICATIONS
    
    

    Type	Thickness
    A	0.85 mm (0.0335 in)
    B	0.88 mm (0.0346 in)
    C	0.91 mm (0.0358 in)
    D	0.94 mm (0.0370 in)
    E	0.97 mm (0.0382 in)
    F	1.00 mm (0.0394 in)
    G	1.03 mm (0.0406 in)
    H	1.06 mm (0.0417 in)
    I	1.09 mm (0.0429 in)
    J	1.12 mm (0.0441 in)
    K	1.15 mm (0.0453 in)
    L	1.18 mm (0.0465 in)
    M	1.21 mm (0.0476 in)
    N	1.24 mm (0.0488 in)
    O	1.27 mm (0.0500 in)
    P	1.30 mm (0.0512 in)
    Q	1.33 mm (0.0524 in)
    R	1.36 mm (0.0535 in)
    S	1.39 mm (0.0547 in)
    T	1.42 mm (0.0559 in)
    U	1.45 mm (0.0571 in)
    V	1.48 mm (0.0583 in)
    W	1.51 mm (0.0594 in)
    X	1.54 mm (0.0606 in)
    Y	1.57 mm (0.0618 in)
    Z	1.60 mm (0.0630 in)
    AA	1.63 mm (0.0642 in)
    AB	1.66 mm (0.0654 in)
    AC	1.69 mm (0.0665 in)
    AD	1.72 mm (0.0677 in)
    AE	1.75 mm (0.0689 in)
    AF	1.78 mm (0.0701 in)
    AG	1.81 mm (0.0713 in)
    AH	1.84 mm (0.0724 in)
    AI	1.87 mm (0.0736 in)
    AJ	1.90 mm (0.0748 in)
    AK	1.93 mm (0.0760 in)
    AL	1.96 mm (0.0772 in)
    AM	1.99 mm (0.0783 in)
    AN	2.02 mm (0.0795 in)
    AO	2.05 mm (0.0807 in)
    AP	2.08 mm (0.0819 in)
    AQ	2.11 mm (0.0831 in)