Camshaft And Rocker Arms - Yamaha TTR90 1999 Fahrer-Handbuch Und Wartungs-Handbuch

CAMSHAFT AND ROCKER ARMS

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REMOVAL POINTS
Rocker arm shaft
1. Remove:
Rocker arm shafts
NOTE:
Use a slide hammer bolt 1 and weight 2 to
slide out the rocker arm shafts.
Slide hammer set:
YU-1083-A
Slide hammer bolt:
90890-01085
Weight:
90890-01084
INSPECTION
Camshaft
1. Measure:
Cam lobes length a and b
Out of specification → Replace.
Cam lobes length limit:
Intake:
a 25.4 mm (1.00 in)
b 21.0 mm (0.83 in)
Exhaust:
a 25.26 mm (0.99 in)
b 21.017 mm (0.83 in)
ASSEMBLY AND INSTALLATION
1. Apply:
Molybdenum disulfide oil
(onto the camshaft cam lobe)
Engine oil
(onto the camshaft bearing)
2. Install:
Camshaft 1
ENG