Cobra CX50P3, Manual, Page: 72 / 78

72
Front Fork Operation
The front suspension on the CX50SR works under the principals of hydraulic
damping
Shock preload
Loosen the set screw and turn the spring perch in full turn increments to get the
desired sag settings.
NOTE:
Always leave the spring perch rotated in such position so that the set screw is
easily accessible.
Carburetion
Although your Cobra is sent from the factory with the carburetor jetted for optimal
performance, you may find it necessary to adjustment your particular jetting due
to current weather conditions, altitude, fuel variations, and/or engine
modifications.
CAUTION:
Proper jetting is very
important for engine performance and engine life.
Symptoms of improper jetting are listed below.

Symptoms of incorrect oil or oil / fuel ratio
o
Poor acceleration
o
Misfire at low engine speeds
o
Excessive smoke
o
Spark plug fouling
o
Excessive black oil dripping from exhaust system

Symptoms of too rich a fuel mixture
o
Poor acceleration
o
Engine will not ‘rev’ out, blubbers on top
o
Misfire at low engine speeds
o
Excessive smoke
o
Spark plug fouling
o
Wet, black, or overly dark spark plug (when removed for inspection)

Symptoms of too lean a fuel mixture
o
Pinging or rattling
o
Erratic acceleration
o
Same actions as running out of fuel
o
High engine temperature
o
White spark plug (when removed for inspection)
NOTE: When inspecting the spark plug to evaluate jetting, a properly jetted
machine will produce a spark plug that is dry and light tan in color.