Overhauling - Yamaha SRX440 1980 Service Manual

CAUTION: - - - - - - - - - ,
When removing the starter cable, take
care so that the rubber cap, coil spring
and starter cable do not fall off or are
not lost. A lso use specia I ca re not to
scratch the rubber seat su rface.
No.6
1. Main jet
Bad (Due to lean a mixture. the spark
pluq melts.)
Check the piston for holes or seizure.
Check the cooling system, gasoline
octane rating and ignition timing. After
replacing the spark plug with colder
type, tune the carburetor again.
starting with low-speed tuning.
1. Throttle cable
2. Pump cable
3. Starter cable
1980 SRX440
WARNING:--------~
while the engine is hot, Fuel will flow
out of the float chamber which could ig-
nite and cause damage to the
snowmobile and possible injury to the
mechanic.
Place a rag under the carburetor so fuel
does not spread. Place the main jet
cover bolt in a clean place. Keep away
from fire. After assembling the carbure-
tor, firmly tighten the rubber joint screw.
Make sure the throttle outer tube is in
place and the throttle cable moves
smoothly. Clean the carburetor and
allow it to dry.
B. Overhauling
1. Disassembly
a. Remove the intake. silencer assembly.
b. Remove the carburetor from the
engine, and disconnect the control
cables as follows:
1) Loosen the throttle cable holder screw.
2) Remove the pump cable adjuster from
the stay plate. and remove the pump
cable from the lever.
3) Remove the cap from the carburetor.
together with the starter valve, and dis-
connect the starter cable.
4·5
c. Float chamber
emove e our screws,
the float chamber.
2) Remove the main jet
together with the O-ring.
d. Carburetor body
1) Remove the arm pin, together with the
float assembly.
2) Remove the pilot jet and main jet.
3) Remove the main nozzle.
4) Remove the valve seat assembly.
5) Remove the power jet.
6) Remove the pilot screw, together with
the coil spring.
7) Remove the throttle stop screws,
together with the coil spring.