Honda Motorcycle Owner's Manual page 89

Inspection
1. Disconnect the spark plug caps from the spark
Plugs.
2. Clean any dirt from around the spark plug
bases. Remove the spark plugs using the
spark plug wrench (5) furnished in the tool kit.
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3. Inspect the electrodes and center
porcelain for deposits, corrosion or carbon
fouling. If the corrosion or deposit is
heavy, replace the plug. Clean a carbon-or
wet-fouled plug with a plug cleaner,
otherwise use a wire brush.
4. Check the spark plug gap (6) using a
wire type feeler gauge. If adjustment is
necessary, bend the side electrode (7)
carefully.
The gap should be:
0.80-0.90 mm(0.031-0.035 in)