Checking The Valve Clearance - Yamaha F200B Service Manual

2. Turn the flywheel magnet clockwise to
align the protrusion a on the flywheel
magnet with the protrusion b on the
pulser coil.
3. Measure the pulser coil air gap c. Adjust
if out of specification.
Pulser coil air gap c:
1.4–1.6 mm (0.055–0.063 in)
4. Loosen the pulser coil screws 1 and
adjust the pulser coil air gap.
a
c
b
5. Tighten the pulser coil screws 1, and
then check the pulser coil air gap.
Pulser coil screw 1:
4 N·m (0.4 kgf·m, 3.0 ft·lb)
6. Install the wiring harness guide and wir-
ing harness guide bolts. See "Installing
the wiring harness" (7-23).
7. Install the flywheel magnet cover.

Checking the valve clearance

Measure the valve clearances when the
engine is cold.
Do not turn the flywheel magnet counter-
clockwise. Otherwise, the water pump
impeller could be damaged.
1. Reduce the fuel pressure. See "Reduc-
ing the fuel pressure" (6-7).
When measuring or adjusting the valve clear-
ances, the fuel line must be disconnected, so
make sure to reduce the fuel pressure before
performing the disassembly procedure.
2. Remove the flywheel magnet cover and
3. Remove the blowby hose. See "Remov-
4. Remove the speed sensor coupler from
5. Remove the wiring harness from the
1
6. Remove the ignition coils and spark
7. Disconnect the cooling water hose 1.
8. Remove the knock sensor lead a from
9. Remove the engine ECM bracket 2.
10. Turn the flywheel magnet clockwise and
11. Check that the "II" marks d on the VCT
Power unit (check and adjustment)
TIP:
engine ECM cover.
ing the intake silencer" (6-17).
the bracket. See step 16 in "Removing
the power unit" (7-8).
engine ECM bracket and holder. See
steps 4–16 in "Removing the wiring har-
ness" (7-20).
plugs.
the engine ECM bracket 2.
2
a
align the "1TDC" mark b on the flywheel
magnet with the pointer c.
assembly (PORT) and driven sprocket
(PORT) are aligned, and check that the
"I" marks e on the VCT assembly
(STBD) and driven sprocket (STBD) are
aligned.
7
1
7-2