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The popping at idle and deceleration (when the throttle is in the idle position) could be a lean mixture at idle. A lean mixture sitting at idle for a long light would cause the engine to run hot. Also, as the engine reaches operating temperatures, the idle will pick up.
Yes it could be, but it could be any number of things. The only way to be certain would be to hear it. Ask a mate who has some knowledge of bikes. Where the sound is coming from will give you an idea of the fault, but only an idea.
Ethanol in the fuel will often lower a bikes idle speed. Honda gives you a simple screw to turn to raise or lower the idle speed on your motorcycle. it is part #10 on the following diagram.
http://www.bikebandit.com/houseofmotorcycles/2006-honda-vtx1300r/o/m2927#sch410152
The black plastic knob is located on the left side of the engine, when you are sitting on the bike, under the carburetor. Try turning the knob 1/4 to 1/2 turn clockwise. This should open the carburetor just enough to allow the cycle to idle again.
If the bike had been sitting for a while and it was running but wouldn't hold idle, you likely need to remove the carburetors and thoroughly clean them. To confirm it's the carburetors you can use a spray bottle to spray a little gas into the carb throats and try cranking. If the engine fires up, your problem is definitely in the carbs; more than likely gummed up. Remember not to use steel objects if you're cleaning the jets because you will enlarge them as a result.
A bad throttle position sensor wouldn't cause those symptoms. Return it before you waste more money. Check the EGR valve to make sure it's fully closed at idle
My bike is the same, It runs at exactly 100 degrees more than outside air temp, and at a light, or in stop and go traffic, it will go to 212 when the fans come on. It is like sitting on a blowtorch. But that is normal, Harley's run a lot hotter than that. Mine is an 02 S4 Ducati. Been like that since new. I avoid Daytona, the worst place on earth for bikes. They have an average of 1200 burned bikes every year. Sitting in traffic for hours, not moving. And the noise, my lord, get a stinking muffler on that pig!!! Hope this helps.
Remove and clean the carb. Sitting around can let the gas evaporate. This leaves a varnish residue in the carb. Remove the carb then remove the float bowl. Use a spray carb cleaner to spray into the jets and carb circuits. Remove the throttle screw and air screw and spray into the screw holes. The low speed idle circuit is the problem so concentrate on the air screw hole. Put both screws back where they came from and turn each until it LIGHTLY seats. Now back each screw one and one half turns. This is the factory setting. If the bike still does not want to idle, there is still some varnish or trash plugging up the idle circuit.
That is quite normal - these bikes run very hot and will typically reach temp where fan kicks in (103 deg C) while bike is sitting at idle, even if not particularly hot weather. Needs good airflow through the rad to keep the temp down. Fortunately, when fan comes on it lowers the temp quite quickly.
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