3. Adjustments
USE AND MAINTENANCE MANUAL
CHAPTER 3
ADJUSTMENTS
2-Strokes - Edition 01 / 2023
88
A
B
C
Test run
After heating the engine equipped with the carburettor and
normal spark plug, run two or three laps of the circuit and
check the smooth running of the engine and the spark plug
colour.
Colour
Condition of spark plug
Normal
Insulator is dry and burnt brown.
Over burned
(too lean)
Insulator is whitish.
Oil fouled
(too rich)
Insulator is sooty and wet.
A. Normal
B. Over burned (too lean)
C. Oil fouled (too rich)
