Yamaha F115 Owner's Manual page 94

Maintenance
F115, LF115
F130
To check the spark plug
1. Check the condition of the spark plug. If
electrode erosion becomes excessive or
carbon and other deposits are exces-
sive, replace the spark plug with the
specified plug.
Standard spark plug:
LKR6E
2. Measure the spark plug gap using a
thickness gauge. If the spark plug gap is
out of specification, replace the spark
plug with the specified plug.
88
ZMU08119
1. Spark plug gap
2. Spark plug part number
3. Spark plug I.D. mark (NGK)
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
To install the spark plug
1. Wipe off any dirt from the threads, insu-
lator, and gasket surface of the spark
plug.
2. Install the spark plug, and then tighten it
ZMU08215
to the specified torque.
Spark plug tightening torque:
25 N·m (2.5 kgf·m, 18 lb·ft)
TIP:
If a torque-wrench is not available when you
are reinstalling a spark plug, a good estimate
of the correct torque is 1/12 turn past finger-
tight. When you are installing a new spark
plug, a good estimate of the correct torque is
1/2 turn past finger-tight.
3. F115, LF115: Install the spark plug cap.
4. F130: Install the ignition coil, and then
tighten the bolt to the specified torque.
Bolt tightening torque:
8 N·m (0.8 kgf·m, 5.9 lb·ft)
5. Install the cover.