Checking The Sprocket; Checking The Valve Lifter; Checking The Camshaft - Yamaha F225F Service Manual

POWR
q
q
p
o r
n
TIP:
Make sure to keep the parts in the order of
removal.

Checking the sprocket

1. Check the VCT assemblies and driven
sprockets. Replace the VCT assembly or
driven sprocket if cracked, damaged, or
worn.

Checking the valve lifter

1. Check the valve lifters. Replace if dam-
aged, scratched, or worn.
2. Measure the valve lifter outside diameter
a.
Valve lifter outside diameter a:
30.970–30.980 mm
(1.2193–1.2197 in)
7-47
Power unit
q
q
m
r
a

Checking the camshaft

1. Check the edge and face of the flange on
the camshafts (PORT) and intake cam-
shaft (STBD) that is used for the cam
position sensor. Replace the camshaft if
damaged, rough, or scratched.
TIP:
• Be careful not to scratch or damage the
face of the flange.
• If there is a scratch that is more than
0.2 mm (0.008 in) deep or more than
0.5 mm (0.020 in) wide on the surface of
the flange, a malfunction may occur in the
cam position sensor signal.
2. Measure the cam lobe height a and
width b.
b
Cam lobe height a:
Intake:
46.661–46.761 mm
(1.8370–1.8410 in)
Exhaust:
46.960–47.060 mm
(1.8488–1.8528 in)
Cam lobe width b:
Intake and exhaust:
35.950–36.050 mm
(1.4154–1.4193 in)
a