QUOTE(Lowenkreuz @ Nov 25 2011, 05:11 PM)
I think that's call dieseling. Carb related problem i think. I also have that problem sometimes, not sure why also....

QUOTE(Codyx @ Nov 25 2011, 11:03 PM)
*raise hand*
that's why i off slowly >ON>Power>off...step by step
QUOTE(kuaLe_AGX @ Nov 25 2011, 11:06 PM)
same here. Some says might be carbie engine syndrome.
So the problem seemed normal... Only way to solve is perlahan-perlahan off... Dun act cool cepat-cepat turn off
From uncle wiki:
Potential causes
Dieseling can occur for several reasons:
1. Built-up carbon in the ignition chamber can glow red after the engine is off, providing a mechanism for igniting unburnt fuel. Such a thing can happen when the engine runs very rich, depositing unspent fuel and particles on the pistons and valves. Similarly, rough metal regions within the piston chamber can cause this same problem, since they can glow red. It has also been suggested that an improperly rated spark plug can retain heat and cause the same problem.
2. A carburetor that does not completely close can contribute to running once the engine is off, since the extra fuel and oxygen mixture can combust easily in the warm piston chamber. Similarly, hot vaporized oil gases from the engine crankcase can provide ample fuel for dieseling.
3. Incorrect timing.
4. An engine that runs too hot or too lean may produce an environment conducive to allowing unspent fuel to burn.
5. An idle speed that is too fast can leave the engine with too much angular momentum upon shutdown, raising the chances that the engine can turn over and burn more fuel and lock itself into a cycle of continuous running.
haiz...