Honda PIONEER 2022 Owner's Manual page 209

Spark Plugs
7. Discard the spark plug if there is apparent wear or if the insulator
is cracked or chipped.
8. Using a wire-type feeler gauge, check the spark plug gap. If
adjustment is necessary, bend the side electrode carefully.
The gap should be:
0.03 – 0.04 in (0.8 – 0.9 mm)
UNDER CARGO BED
200 Servicing Your Honda
spark plug caps
spark plug gap
0.03 – 0.04 in
(0.8 – 0.9 mm)
center
electrode
side
electrode