5. FUEL SYSTEM
5-2
MXU 500
SERVICE INFORMATION
GENERAL INSTRUCTIONS
xDo not bend or twist control cables. Damaged control cables will not operate smoothly.
xWhen disassembling fuel system parts, note the locations of O-rings. Replace them with new
ones during reassembly.
xBefore float chamber disassembly, loosen the drain screw to drain the residual gasoline into a
clean container.
xAfter the carburetor is removed, plug the intake manifold side with a clean shop towel to prevent
foreign matters from entering.
xWhen cleaning the carburetor air and fuel jets, the O-rings and diaphragm must be removed first
to avoid damage. Then, clean with compressed air.
xWhen the machine is not used for over one month, drain the residual gasoline from the float
chamber to avoid erratic idling and clogged slow jet due to deteriorated fuel.
SPECIFICATIONS
Item Standard
Type CVK
I.D. No. L88A ATKF
Bore size I36.5 mm (I1.46 in)
Float level 17 mm (0.67 in)
ON ROAD #128Main jet No.
OFF ROAD #130
Slow jet No. #40
Choke jet No. #90
Idle speed 1500r100 rpm
Throttle grip free play 3阡5 mm (0.12阡0.2 in)
Pilot screw opening 1 1/4r1/2
Gasoline is very dangerous. When working with gasoline, keep sparks and flames away
from the working area.
Gasoline is extremely flammable and is explosive under certain conditions. Be sure to
work in a well-ventilated area.
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