Spark Plug Inspection - Yamaha TDM850 1996 Service Manual

SPARK PLUG INSPECTION

SPARK PLUG INSPECTION
1. Remove:
S Spark plug caps
S Spark plugs
CAUTION:
Before completely removing the spark plug,
use compressed air to clean the cylinder head
cover areas to prevent dirt from falling into the
engine.
2. Inspect:
S Spark plug type
Incorrect ! Replace.
Standard spark plug:
DPR8EA-9 (NGK)
X24EPR-U9 (NIPPONDENSO)
3. Inspect:
S Electrode 1
Wear/Damage ! Replace.
S Insulator 2
Abnormal color ! Replace.
Normal color is a medium-to-light tan color.
4. Clean:
S Spark plug
(with spark plug cleaner or wire brush)
5. Measure:
S Spark plug gap a
Use a wire gauge.
Out of specification ! Adjust.
6. Install:
S Spark plug
NOTE:
Before installing a spark plug, clean the gasket
surface and plug surface.
3-18
INSP
ADJ
Spark plug gap:
0.8 X 0.9 mm
18 Nm (1.8 mSkg)