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Discussion Starter · #1 ·
I want to buy new crankshaft (the engine ran out of oil) and I don't know what bearings to buy for it. Which one to choose? Can you give me a code or advice?
 

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Honda: INNOVA125i(2010); CBR250R(2013)
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I want to buy new crankshaft (the engine ran out of oil) and I don't know what bearings to buy for it. Which one to choose? Can you give me a code or advice?
It is a complex process and the work needs to be done clean and accurate. Also need:
1. Special Measuring Tools, and...
2. Special Tool for Inserting the Bearings.

To choose the correct bearing you need to take two measurements:
1. Main bearing housing size.
2. Main bearing journal size.

Then according to the CODE written on the crankcase(A, B, or C) + two measurements, you look at the Honda table and choose:
A - Blue
B - Black
C - Brown
D - Red
E - Green
F - Yellow
G - Pink.

REFERENCE:
Haynes p.2B*33
Honda service book p.12-10 to 12-13.
 

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Discussion Starter · #5 ·
Crankcase code: C
Crankshaft measurements: 33.990
Please help me to chose correct bearings.
 

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Crankcase code: C
Crankshaft measurements: 33.990
CODE C (If it meets the I.D. specifications + 33.985mm to 34.000mm ===>>>A(Blue)
But if the I.D in crankcase (CODE C) does not meet the specification 38.012mm to 38.016mm, an O.S. bearing is needed (Over Size):
D - Red
E - Green
F - Yellow

G - Pink.

To choose the correct bearing you need to take two measurements:
1. Main bearing housing size - Crankcase Bearing Bore/ I.D. ???
2. Main bearing journal size - Crankshaft.
 
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