TT250
Owner’s
and
Service
Manual
www.CSCMotorcycles.com
93
Item
Symptom
Cause
Vehicle
Effect
Maintenance
Action
low
power
on
the
air
cleaner
element
idling,
excessive
fuel
consumption,
dark
smoke
exhaust
cleaner
element
Excessive
intake
noise
Cracks
or
chaps
on
the
air
cleaner
shell
Poor
performance,
excessive
intake
noise
Replace
the
air
cleaner
shell
Exhaust
system
Excessive
exhaust
noise
Cracks
or
openings
in
exhaust
system
Poor
performance,
excessive
noise
Replace
defective
components
Exhaust
system
Smoke
emanating
from
exhaust
Worn
rings,
worn
valve
seal,
choke
in
on
position,
carburetor
too
rich
Smoke
trail
Check
choke
position,
check
carburetor,
perform
compression
check
(if
compression
low,
isolate
cause
and
correct)
Engine
Poor
engine
performance
See
below
See
below
See
below
Starter
Difficult
starting
Clogged
air
filter,
carburetor
not
adjusted
correctly,
valves
too
tight,
battery
low
Difficult
to
start
engine
Check
air
filter,
check
charging
circuit,
check
valves;
adjust/correct
as
required
Engine
Overheating
Mud
or
other
debris
in
cooling
fins,
low
oil,
running
in
too
high
a
gear,
engine
running
too
lean
Engine
overheats
Check
for
air
leaks
in
intake
path,
check
to
make
sure
all
fins
are
clear,
check
oil
level,
check
valve
adjustment.
Engine
Excessive
fuel
consumption
Clogged
air
filter,
engine
valves
not
adjusted
correctly,
carburetor
not
adjusted
correctly;
chain
too
tight,
tire
pressure
low
Poor
fuel
economy
Check
possible
causes
and
correct
any
departures
from
required
adjustment
setting
Engine
Missing
or
sputters
Defective
spark
plug,
defective
coil,
defective
ignition
wiring
Missing
Inspect
and
replace
defective
component(s).
