Question about Kymco 990 Super Duke Black Motorcycles

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It won't run and dumps fuel.I've dipped thecarburetor and cleaned it well.the fuel just runs out the lower spring covered house that dumps out onto the ground

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tombones

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The problem is a bit of trash is preventing the float needle from closing fully to stop the flow of gas. Try this; drain the float bowl then close the drain and turn on the gas. Tap the float bowl solidly with the end of a screwdriver handle. The object is to free up the float / shake loose the trash. If doing that a couple of times does not fix the problem, Remove the float bowl and spray the interior of the carb using spray carb cleaner. Pay special attention to the float pin area. With the float bowl off you should be able to gently lift and lower the float. Lifting should shut off the gas and lowering should let the gas flow again. If the float shuts off the gas when raised, put the float bowl back in place and see if the carb still over fills. If so, then the float is defective and you will need a new one. Please rate my answer. Thanks. It won't run and dumps - tombones49_151.gif

Posted on May 30, 2011

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  1. Disconnect negative battery cable at battery.
  2. Drain cooling system.
  3. Raise vehicle on hoist.
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  5. Remove lower radiator hose clamp and lower radiator hose at thermostat housing.
  6. Remove thermostat housing mounting bolts, thermostat housing and thermostat.

To install:
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  2. Install thermostat (spring side down) into recessed machined groove on timing chain cover.
  3. Position thermostat housing on timing chain cover.
  4. Install two housing-to-timing chain cover bolts. Tighten bolts to 115 inch lbs. (13 Nm).
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  5. Install lower radiator hose on thermostat housing.
  6. Install splash shield.
  7. Lower vehicle.
  8. Fill cooling system.
  9. Connect negative battery cable to battery.
  10. Start and warm the engine. Check for leaks.


Removal & Installation, 4.0 liter engine

  1. Disconnect the negative battery cable.
  2. If necessary, disconnect the coolant temperature sensor electrical connector.
  3. Disconnect the upper radiator hose from the thermostat housing.
  4. Remove the attaching bolts and lift the housing from the engine.
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Remove the thermostat and gasket.
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  5. Install the upper radiator hose to the housing and tighten the hose clamp.
  6. Connect the coolant temperature sensor connector to the housing.
  7. Refill the cooling system.

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