Spark Plug - Honda XR250R Owner's Manual

SPARK PLUG

Recommended plugs:
Standard:
DPR9Z (NGK) or X27GPR-U (ND)
For most riding conditions this spark plug
heat range number is satisfactory. However, if
the motorcycle is going to be operated for
extended periods at high speeds or near
maximum power in hot climates, the spark
plug should be changed to a colder heat range
number.
(1) Multi-purpose wrench
54
1. Clean any dirt from around the spark plug
base.
2. Disconnect the spark plug cap and remove
the spark plug with the multipurpose
wrench (1) provided in the tool bag.
3. Visually inspect the spark plug electrodes
for wear. The centre electrode should have
square edges and the side electrode
should not be eroded. Discard the spark
plug if there is apparent wear of if the
insulator is cracked or chipped.
(2) Spark plug gap (3) Side electrode