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Spark Plug Inspection
Have the spark plug checked by an authorized SYM dealer. If the electrodes are contaminated with heavy
deposits or the insulator is damaged, replace with a new one. Measure the spark plug gap with a wire type
feeler gauge. The gap should be within 0.6 ~ 0.7 or 0.8 ~ 0.9 mm. If adjustment is needed, bend the side
electrode ○A carefully.
Recommended spark plug: NGK CR8E (Joymax 250/300), gap: 0.6 ~ 0.7 mm
Recommended spark plug: NGK CR8EA-9 (Joymax+125), gap: 0.8 ~0.9 mm
Air Cleaner / V-belt Air Cleaner Inspection
A dirty air cleaner element can reduce the engine performance and
increase fuel consumption.
Inspect the air cleaner by following the below instructions.
Remove the screws ○B and remove the air box cover ○A .
Remove the screws ○C to take out the air cleaner element.
If the air cleaner element ○D is damaged or too dirty, have it changed by a SYM authorized dealer.
To install the element, do in the reverse order of the above instructions.
Remove the air box drain hose ○E , drain the hose if needed.
Remove the 5 bolts and take out the left crankcase cover.
If the V-belt air cleaner element ○F is damaged or too dirty, have it changed by a SYM authorized
dealer.
NOTE :
Joymax Z+125 does not equip with v- belt air cleaner.
Make sure to keep the dust from entering the inlet pipe during inspection.
Use SYM genuine air filter element to ensure the engine performance.