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Crankcase-crankshaft bearing selection






• Inspect each bearing of upper and lower crankcases for any

damage.

 
Place plastigauge on each crankshaft journal in the usual manner.

09900-22301: Plastigauge

 

NOTE:

Do not place the plastigauge on the oil hole, and do not rotate the sha ft when plastigauge is in place.

 

 

 
Mate the lower crankcase with the upper crankcase, and tighten the crankshaft tightening bolts with specified torque value in the indicated order.

 

  Initial Tightening Final Tightening
    8 mm bolt 13 N·ni (1.3 kg-m) 9.5 lb-ft 28 - 32 N-m (2.8 - 3.2 kg-m) 20.0 - 23.0 lb-ft

 

Tightening torque

 

 

 
R emove the lower crankcase, and measure the width of compressed plastigauge in the usual manner.

Crank journal bearing oil clearance

Standard: 0.012 - 0.036 mm (0.0005 - 0.0014 in)

Seivice Limit: 0.08 mm (0.0031 in)

 

• If the width at the widest part exceeds the limit, replace the set of bearings with new ones by referring to the selection table.


 

 

 
Check the corresponding crankcase journal I.D. code num­

ber CD, " A" or " B" which are stamped on the rear of upper crankcase.

• Check the corresponding crankshaft journal O.D. code number ®, " A", " B" or " C" which are stamped on the crankshaft.

 

 

  Crankshaft O.D. ®
  Code A B c
Crankcase l.D. CD A Green Black Brown
B Black Brown Yellow

 

Bearing selection table Crankcase l.D. specification

Code I.D. specification
  A 34.992 - 35.000 mm (1.3776 - 1.3780 in)
  B 35.000 - 35.008 mm (1.3780 - 1.3783 in)

 

 

 
Crankshaft journal 0.D. specificati on

Code O.D. specification
  A 31.992 - 32.000 mm (1.2595 - 1.2598 in)
  B 31.984 - 31.992 mm (1.2592 - 1.2595 in)
c 31.976 - 31.984 mm (1.2589 - 1.2592 in)

 

 

09900-20202: Micrometer (25 - 50 mm)


 

 


 
Bearing thickness specification

(Grooved bearing with oil hole... For lower case)

Color (Part No.)   Specification
Green (12229-33COO-OAO)   1.486 - 1.490 mm
(0.0585 - 0.0587 in)
Black 1.490 - 1.494 mm
(12229-33COO-O BO) (0.0587 - 0.0588 in)
Brown (12229-33COO-OCO) 1.494 - 1.498 mm
(0.0588 - 0.0590 in)
Yellow 1.498 - 1.502 mm
(12229-33COO-O DO) (0.0590 - 0.0591 in)

NOTE:

* Grooved bearings have the same specification as the Grooved bearing with oil hole.

* These parts numbers are shown as follows. 12229-30810-

XXX. (Grooved bearing)

 






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