Yamaha Tenere 700 2020, Service Manual

Page: 266 / 472

CRANKSHAFT AND BALANCER SHAFT
5-79
For example, if the crankcase J
1
and balanc-
er shaft web J
1
numbers are 6 and 5 respec-
tively, then the bearing size for J
1
is:
EAS31075
CHECKING THE CRANKSHAFT
1. Check:
• Balancer drive gear
Damage/wear
→
Replace the balancer drive
gear and balancer shaft assembly as a set.
Excessive noise during operation
→
Replace
the balancer drive gear and balancer shaft
assembly as a set.
2. Measure:
• Crankshaft runout
Out of specification
→
Replace the crank-
shaft.
3. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear
→
Replace the crankshaft.
4. Measure:
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification
→
Replace the crank-
shaft journal bearings.
NOTICE
ECA13920
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the crank-
shaft journal bearings must be installed in
their original positions.
a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions
of the cylinder and crankcase.
b. Install the crankshaft journal upper bear-
ings “1” and the crankshaft into the cylin-
der.
TIP
Align the projections “a” on the crankshaft jour-
nal upper bearings with the notches “b” in the
cylinder.
c. Put a piece of Plastigauge® “2” on each
crankshaft journal.
TIP
Do not put the Plastigauge® over the oil hole in
the crankshaft journal.
J
1
(crankcase) – J
1
(balancer shaft web)
= 6 – 5 =
1 (blue)
Bearing color code
Code 1
Blue
Code 2
Black
Code 3
Brown
Code 4
Green
Code 5
Yellow
Runout limit
0.030 mm (0.0012 in)
G0 8 9016
Journal oil clearance
0.018–0.042 mm (0.0007–0.0017
in)
1
a
b
G0 8 9019