Change spark plugs
Check the colour of the ceramic insulation around the central electrode: an even, light brown colour indicates the engine is in good condition and running at the right temperature.
Inspect the centre electrode for wear.
Warning
Do not use spark plugs with inadequate thermal rating or incorrect thread length.
The spark plug must be securely installed.
If a spark plug is loose, it can overheat and damage the engine.
Spark plug type
Make: NGK
Type: MAR9A-J
Remove the seat (Removing the seat).
Remove the fairings (Removal of the fairings).
Remove the fuel tank (Removing the fuel tank).
Working on the vertical head, loosen screws (1), recover washer (2) and remove coil (3).
Use tool no. 88173.2877 to replace the spark plug and tighten the new one to 12 Nm (Min. 11 Nm - Max. 13 Nm).
Position coil (3), washer (2) and tighten screw (1) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm).
Work in the same way on the horizontal head.
Remove the screw (4) and recover washer (5).
Loosen coil (6).
Use tool no. 88713.2877 to replace the spark plug and tighten the new one to 12 Nm (Min. 11 Nm - Max. 13 Nm).
Position coil (6), washer (5) and tighten screw (4) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm).
Refit the fuel tank (Refitting the fuel tank).
Refit the fairings (Refitting the fairings).
Refit the seat (Refitting the seat).