1-5
E
GEN
INFO
SPECIAL SERVICE TOOLS
SPECIAL SERVICE TOOLS
Using the correct special service tools recom-
mended by Yamaha, will aid the work and
enable accurate assembly and tune-up. Impro-
visations and using improper tools can dam-
age the equipment.
NOTE:
For U.S.A. and Canada, use part numbers
starting with “J-”, “YB-”, “YM-”, “YS-”, “YU-” or
“YW-”.
For other countries, use part numbers start-
ing with “90890-”.
MEASURING
1
Dial gauge stand
P/N. 90890-06583
2
Dial gauge needle
P/N. 90890-06584
3
Dial gauge stand set
P/N. YB-06585
90890-06585
4
Dial indicator gauge
P/N. YU-03097
Dial gauge set
P/N. 90890-01252
5
Pocket tester
P/N. YU-03112
90890-03112
6
Digital multimeter
P/N. YU-34899-A
7
Digital circuit tester
P/N. 90890-03174
8
Fuel pressure gauge adapter
P/N. YW-06842
90890-06842
9
Fuel pressure gauge
P/N. YB-06766
90890-06786
4 12
3
5YU-03097 90890-01252 90890-06583 90890-06584
YB-06585
90890-06585
YU-03112
90890-03112
8YW-06842
90890-06842790890-03174
6YU-34899-A
9YB-06766 90890-06786
ProCarManuals.com
5-46
EPOWRCAMSHAFTS
SERVICE POINTS
Camshaft removal
1. Install:
Dial gauge needle
Dial gauge stand 1
(into spark plug hole #1)
Dial gauge 2
2. Turn the drive coupling counterclockwise,
and then check if cylinder #1 is at TDC of
the compression stroke with a dial gauge.
NOTE:
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
Dial gauge stand:
90890-06583
Dial gauge needle:
90890-06584
Dial gauge stand set:
YB-06585/90890-06585
Dial indicator gauge:
YU-03097
Dial gauge set:
90890-01252
2
1
INEX
3. Make the alignment marks a on the timing
chain and camshaft sprockets.
a
4. Remove:
Timing chain tensioner 1
Gasket
1
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