URAL Motorcycles 2000 -10 series, Руководство по ремонту, Страница: 167 / 193

9 Fuel, Carburetion, Air Intake, Exhaust
9.1 Description and Specifications
Fuel is gravity-fed to the carburetors through a manual valve in the bottom of the tank
and via hoses. Carburetors are Keihin Seiki CVK type, with separate enrichment circuits
for cold starting. Engine air intake is through a central air filter to flexible intake tubes
("pipes"). Exhaust exits the front of the cylinders through header pipes to the muffler.
Some models use two-into-one headers with a single muffler. While most models have
two-into-two headers with separate left and right mufflers.
9.2 Fuel Tank, Fuel Valve
The fuel (“gasoline”) tank is welded steel. If a fuel tank begins to leak at a welded seam,
it is safer and usually more economical to replace the tank than attempt to repair it.
To remove the fuel ("gasoline") tank:
1. Drain fuel out of the tank.
2. Remove the fuel hoses.
3. Remove the driver's saddle, then undo the front and rear bolts fastening the fuel tank.
By shifting the tank back and raising it at the rear, it can be removed.
Reinstall the fuel tank in reverse sequence.
Note: Before reinstalling the fuel tank, it is a wise precaution to remove the fuel valve
("fuel cock") and flush any resident debris from the tank outlet.
Inspect the fuel tank for cracks, dents, peeling of paint, etc. The fuel tank can be tested
for leaks by submerging it in water with a regulated air hose connected to the fuel fitting,
and pressurizing the tank with no more than 6 psi. / 0.4 kgf/cc. A stream of air bubbles
indicates a leak.
Clean any rust spots or peeling paint from the outside, sand, prime and repaint.
Dismantle the settling bowl and clean the filter. Inspect the fuel hoses for cracking or
swelling, especially on the inside. If the hoses are soft, replace them.
Test the fuel valve with fuel in the tank and a container under the open fuel line to collect
fuel. With the valve off, check for leaks and no fuel flow. With the valve on, fuel should
flow freely. Select the reserve position and check that fuel continues to flow. Should
leaks be revealed, either replace the valve or rebuild it.
To rebuild the fuel valve, dismantle it and lap the valve faces flat. Wash well with
detergent and hot water, wipe dry and reassemble.