Honda FJ500 Manuel De L'utilisateur page 49

4. Spark plug service
Recommended spark plug: BPR5ES (NGK)
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
1. Remove the spark plug cap.
Use the spark plug wrench to remove the spark plug.
If the engine has been running, the muffler will be very hot. Be careful not
to touch the muffler.
SPARK PLUG CAP
2. Visually inspect the spark plug. Discard it if the insulator is cracked or
chipped. Clean the spark plug with a wire brush if it is to be reused.
3. Measure the plug gap with a feeler
gauge.
Correct as necessary by bending the side
electrode.
The gap should be:
0.7–0.8 mm (0.028–0.031 in)
46
W16EPR-U (DENSO)
SPARK PLUG WRENCH
0.7–0.8 mm
(0.028–0.031 in)