Sym JOYMAX 250 User Manual

21
3). Check procedure:
Ⅰ). Electrical resistance measurement:
a). Use the Ohm function of electrical meter to check the resistance value of fuel injector.
(As shown in figure 20.)
Ⅱ). Injector integrity inspection:
a). Remove the holding bolts of injector, but keep the fuel source steady.
b). Hold the injector with hands, normally there should be no leakage found.
c). Key-on and start the engine, observe the fuel injection condition.
4). Malfunction determination:
Ⅰ). The electrical resistance value between two pins = 11.7 ± 0.6 (Ω)
Ⅱ). Injection status:
a). Good nebulization: Widespread fuel spray indicates normal injector integrity.
(As shown in figure 21.)
Figure 21. Good nebulization- normal injector
Figure 20. Measuring fuel injector electrical
resistance.

Sym JOYMAX 250 Specifications

General

Displacement	249.4 cc
Fuel System	Electronic Fuel Injection
Cooling System	Liquid cooled
Front Suspension	Telescopic fork
Front Brake	Disc
Rear Brake	Disc
Seat Height	770 mm
Dry Weight	182 kg
Width	760 mm
Height	1, 420 mm
Wheelbase	1, 550 mm
Engine Type	4-stroke, Single cylinder
Transmission	CVT
Fuel Capacity	12 L
Length	2190 mm