What happens when a motorcycle runs rich?
When a vehicle is running rich, the fuel-to-air ratio is off because the carburetor is delivering too much gasoline. Typical symptoms of a rich mixture are: Strong smell of gasoline when the machine is at idle. Uneven running (will often slow from regular idle rpms and then stop)
Why does your motorcycle only run on choke?
Fuel goes bad after time, and the first circuit/jet to clog with varnished up fuel is the pilot jet. This circuit delivers fuel for idle, and has the smallest passages found in carburetors.
How do you fix choke on dirt bike?
Put the choke on and start the bike up. Once is running, mist some carb cleaner or starting fluid around the air boot and around the vacuum hoses (if there are any). If the engine momentarily races, then you have an air leak. Read below in the section on how to fix air leaks to get this addressed.
Why does my lawn mower run with the choke on?
If your lawnmower will start and run with the choke on but dies when the choke is turned off, it may have a problem with the carburetor. The carburetor brings air and fuel together and mixes them in the perfect ratio for combustion before they enter the engine.
What happens when you turn the choke on for a carburetor?
When you turn the choke on for a carburetor, it is creating a rich condition. This makes the bike easier to start, by increasing the amount of fuel present in the air/fuel mixture. When an engine is cold, it needs a little richer mixture in order to get up to operating temperature.
Why does my dirt bike only run on choke?
You won’t see one of these on a dirt bike because the choke circuit actually just adds more fuel to the mixture with the same amount of airflow. So, a far too lean air/fuel mixture is why your bike only runs with the choke on.
What happens when you turn off the choke on an engine?
The choke increases the amount of fuel in the mixture, creating a richer mixture. This allows the engine to function at its best until it has warmed up enough to run on its normal operating fuel mixture. At that point the choke is turned off and the engine runs with a leaner fuel/air mixture.
What to do when your motorcycle starts stalling?
Now option b) give it more choke, it goes back up to 1,500 rpm which is great and then 10 seconds later it starts sounding like its going to take off (4k rpm atleast) sometimes you can get it to idle at 1.5k for a minute or two, but then it will either start to die, or it will start revving too high.
Why does my bike stall when I switch gears?
When the bike is actually rolling there doesn’t seem to be too much of a problem, except that it stalls when you switch gears unless you have the choke in a bit (this bike, you can never turn off the choke or it stalls immediately) otherwise the bike stalls even if you are giving it gas.