Table of Contents
Advertisement
2.
Disconnect the spark plug cap.
3.
Remove the spark plug with a plug wrench
( ) provided with your motorcycle.
1
4.
Inspect the spark plug electrodes for wear.
The center electrode ( ) should have square
edges. The side electrode ( ) should not be
eroded. The insulator should not be cracked
or chipped.
5.
Check the spark plug gap ( ), using a wire-
type feeler gauge. If adjustment is necessary,
bend the side electrode carefully. The gap
should be:
0.031 0.035 in (0.80 0.90 mm)
−
Make sure the plug washer is in good
condition.
If you have to install a new plug, first check
the gap.
6.
With the plug washer attached, thread the
spark plug in by hand (to prevent cross-
threading).
3
4
5
−
7.
Tighten the spark plug:
If the old plug is good:
1/8 turn after it seats.
If installing a new plug, tighten it twice to
prevent loosening:
a.
First, tighten the plug:
NGK:
3/4
DENSO:
1/2
b.
Then loosen the plug:
c.
Next, tighten the plug again:
1/8 turn after it seats.
Improperly tightened spark plugs can damage
the engine. Too loose, you can burn a piston.
Too tight, you can damage the threads.
Spark Plug
turn after it seats.
turn after it seats.
Servicing Your Honda
79
Hide quick links:
Advertisement
Table of Contents
