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788-003a
q
w
760-028
a
760-001a
AE01051
SPARK PLUG INSPECTION
You should periodically remove and inspect the spark
plug.
1. Loosen the bolt 1 and remove the side cover 2.
2. Remove the spark plug cap and the spark plug.
3. Check for discoloration and remove the carbon.
4. Check the spark plug type and gap.
a Gap
5. Install the spark plug.
6. Install the spark plug cap.
7. Install the side cover and tighten the bolt.
Standard electrode color:
Tan Color
Standard Spark Plug:
BPR4ES (NGK)
Spark Plug Gap:
0.7–0.8 mm (0.028–0.031 in)
Spark Plug Torque:
17.5 N•m (1.75 kgf•m, 13 lbf•ft)
AE00431
CARBURETOR ADJUSTMENT
The carburetor is a vital part of the engine. Adjusting
should be left to a Yamaha dealer with the professional
knowledge, specialized data, and equipment to do so
properly.
7CH-9-10-b 6/18/04 5:58 PM Page 25