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1) Removal and Installation
a) The two petcocks are bolted to the rear under side of the fuel tank. Remove the two screws holding each petcock.
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3. FUEL SYSTEM
The fuel system consists of fuel tank, (petcock with integral filter), fuel delivery lines, and two constant vacuum carburetors Each section of the fuel system should be checked for possible incorrect operation. Trace for fuel flow from the tank through the petcock, and through the carburetor. Also check for possible air restrictions or leaks.
PETCOCK
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1) Removal and Installation
a) The two petcocks are bolted to the rear under side of the fuel tank. Remove the two screws holding each petcock.
b)
A neoprene 0-ring fitted into a
groove in the pet-
cock mating surface seals the petcock to the fuel
tank.
Check the condition of this O-ring and replace
if it is
broken, flattened, or chipped.
c)
Petcock installation is accomplished by fitting the
O-ring in
position and securing
the petcock with
the two screws.
2) Cleaning
Sediment from the fuel tank (including water) can collect in the petcock chamber. A bolt beneath the fuel outlet can be removed to drain the pet-cock chamber. Larger obstructions can be removed by removing the screw-held plate at the opposite side of the fuel outlet.
CARBURETOR
The TX750 is equipped with two "constant vacuum" carburetors (design is similar in operation to the SU type carburetor) mounted on rubber intake manifolds. Air flow through the venturi is controlled by a throttle slide (vacuum piston). The slide is lifted and lowered by engine vacuum rather than a cable directly linked to the throttle grip.
