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Crankshaft thrust clearance






• With the crankshaft, right-side thrust bearing and left-side thrust bearing inserted in the upper crankcase, use a thick­ ness gauge to measure the thrust clearance on the left-side.

NOTE:

Push the crankshaft to the starter clutch side, so that there is no clearance on the right-side thrust bearing.

 

 

Thrust clearance

 
Standard: 0.045 - 0.100 mm (0.0018 - 0.0039 in)

 

If the th rust clearance exceeds the standard range, adjust the thrust clearance by the following procedures:

 

 

 
R emove the right-side thrust bearing and measure its thick­ ness with a micrometer. If the thickness of the right-side thrust bearing is below standard, replace with a new bearing and once again perform the thrust clearance measurement listed above, checking to make sure it is within standard.

Right-side thrust bearing thickness

Standard: 2.425 - 2.450 mm (0.0955 - 0.0965 in)


 

 

 
U pper case

 

® ® ® ® ®

Lower case

 

 

 
 
CD


 

 

 
 
If the right-side thrust bearing is within the standard range, reinsert the right-side thrust bearing and remove the left· side thrust bearing.

• As shown in the illustration, use a thickness gauge to measure the clearance before inserting of the left-side thrust bearing, and select a left-side thrust bearing from the selection table.

 

 

Thrust bearing selection table

 

Clearance before inserting left-side thrust bearing     Color (Part No.)   Thrust bearing thickness     Thrust clearance
2.420 - 2.445 mm Red 2.350 - 2.375 mm     0.045 - 0.095 mm
(0.0953 - 0.0963 in) (12228-43411) (0.0925 - 0.0935 in)
2.445 - 2.470 mm Black 2.375 - 2.400 mm
(0.0963 - 0.0972 in) (12228-43412) (0.0935 - 0.0945 in)
2.470 - 2.495 mm Blue 2.400 - 2.425 mm
(0.0972 - 0.0982 in) (1.2228-43413) (0.0945 - 0.0955 in) (0.0018 - 0.0037 in)
2.495 - 2.520 mm Green 2.425 - 2.450 mm
(0.0982 - 0.0992 in) (12228-43414) (0.0955 - 0.09Q5 in)
2.520 - 2.545 mm Yellow 2.450 - 2.475 mm
(0.0992 - 0.1002 in) (12228-43415) (0.0965 - 0.0974 in)
2.545 - 2.575 mm White 2.475 - 2.500 mm 0.045 - 0. 100 mm
(0.1002 - 0.1014 in) (12228-43416) (0.0974 - 0.0984 in) (0.0018 - 0.0039 in)

 


 
After selecting a left-side thrust bearing, insert it and again perform the thrust clearance measurement to make sure it falls within the standard range.

NOTE:

Right-side thrust bearing has the same specification as the GREEN (12228-43414) of left-side thrust bearing.

 






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