Cobra 2009 ECX80 AC, Owner'S Manual

Page: 49 / 53

46
Very humid air Richer Leaner
Low altitude Standard None
High altitude Richer Leaner
Low barometric pressure Richer Leaner
High barometric pressure Leaner Richer
NOTE:
•
Before making any carburetor jetting changes verify that:
o
You are using the proper fuel and oil
o
The fuel is fresh and uncontaminated
o
The oil and fuel have been mixed in the proper ratio
o
The carburetor is clean (no plugged jets)
o
The air filter is properly clean and oiled
o
The float height is within proper specification (proper measuring technique
is described later in this section)
NOTE:
Perform all jetting changes on a motorcycle that has been warmed up to proper
operating temperature.
The carburetor on your Cobra motorcycle is quite adjustable. Figure 8 shows its
range of adjustment and in particular what adjustable component affects what
range of operation (specifically throttle position).
Figure 29
AIR SCREW ADJUSTMENT: Adjust for maximum idle speed
The air adjustment screw is located on the left side of the carburetor. It is the
smaller of the two adjustment screws and requires the use of a small flat blade
screw driver for adjustment. After adjusting for maximum idle speed, use the idle
screw to adjust the desired idle speed.
NOTE:
If the air screw requires more than 3 turns out, replace the pilot jet for one that is
one size leaner (smaller number) then readjust the air screw.