Yamaha WaveRunner FZR-GX1800 Service Manual page 220

POWR
J1 J2 J3 J4 J5
J J
1 2
b
J
J J
1 2
Crankcase, connecting rod, and piston
a
J J J
3 4 5
P
J J
J
3 4
5
2. Select:
• Crankshaft main journal bearing
Selecting steps:
1. Check the crankcase journal size number
a on the crankcase.
TIP
If the crankcase journal sizes are the same at
all positions, the size number a is stamped
only at the "J1" position.
Example:
If "J1"–"J5" are different:
55545
If "J1"–"J5" are the same:
5
2. Check the crankshaft journal size number
b on crankshaft web.
3. Select the suitable color c for main bear-
ing.
Calculation formula:
Main bearing size number =
crankcase journal size number a –
crankshaft journal size number b
Bearing size number
1
2
3
4
5
Example:
"J1" crankcase journal size number "5"
"J1" crankshaft journal size number "2"
5 – 2 = 3
Select the size "3", "blue" main bearing.
5-113
E
J1 J2 J3 J4 J5
5 5 5 4 5
J1 J2 J3 J4 J5
5 5 5 5 5
Bearing color c
Brown
Black
Blue
Green
Yellow
1
2
3
4
6
7
8
9