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5
. FUEL SYSTEM
SERVICE INFORMATION
GENERAL INSTRUCTIONS
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.
• Do not bend or twist control cables. Damaged control cables will not operate smoothly.
• When disassembling fuel system parts, note the locations of O-rings. Replace them with new
ones during reassembly.
• Before float chamber disassembly, loosen the drain screw to drain the residual gasoline into a
clean container.
• After the carburetor is removed, plug the intake manifold side with a clean shop towel to prevent
foreign matters from entering.
• When cleaning the carburetor air and fuel jets, the O-rings and diaphragm must be removed first
to avoid damage. Then, clean with compressed air.
• When 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.
Item
Type
I.D. No.
Bore size
Mass of float
Main jet No.
ON ROAD
OFF ROAD
Slow jet No.
Choke jet No.
Idle speed
Throttle grip free play
Pilot screw opening
SPECIFICATIONS
1500±100 rpm
3～5 mm (0.12～0.2 in)
Standard
CVK
LEE8
φ38 mm
7.9±0.2g
#124
#122
#40
---
11/2 ±1/2
UXV 500
5-2
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