Spark Plug: Testing and Inspection

INSPECTION





1. Remove no. 2 positive crankcase ventilation hose.





2. Remove air cleaner hose.
- Loosen the 2 clamps and remove the air cleaner hose.





3. Disconnect throttle cable.
4. Remove no.2 and no.3 cylinder head covers.





- Remove the 4 bolts and head covers.





5. Disconnect high-tension cords from spark plugs.
- Remove the 2 mounting bolts of the No. 1 and No. 2 cord clamps.





- Disconnect the high - tension cords at the rubber boot. DO NOT pull on the cords.

NOTE: Pulling on or bending the cords may damage the conductor inside.





6. Using a 16 mm plug wrench, remove the spark plugs.





7. Using a spark plug cleaner or wire brush, clean the spark plug.
8. Visually inspect spark plugs.





- Check the spark plug for electrode wear, threads damage and insulator damage.
- If abnormal, replace the plugs.

Recommended spark plugs: K16R-U for ND, BKR5EYA for NGK





9. Adjust electrode gap.
- Carefully bend the outer electrode to obtain the correct electrode gap.

Correct electrode gap: 0.8 mm (0.031 in)





10. Install spark plugs.
- Using a 16 mm plug wrench, install the spark pug.

Torque: 20 Nm (14 ft lb)

11. Reconnect high-tension cords to spark plugs.





- Reconnect the high-tension cords to the spark plugs.
- Install the No. 1 and No. 2 cord clamps with the 2 bolts.





12. Install no.2 and no.3 cylinder head covers.
- Install the head covers with the 4 bolts.





13. Connect throttle cable.





14. Install the air cleaner hose with the 2 clamp bolts.





15. Install no.2 positive crankcase ventilation hose.