It's found on all four stroke motocross bikes and it helps you start your engine when it heats up by changing the fuel/air mixture ratio.
yes all Yamaha dirt bikes are fuel injected
no
fuel effeciency is the main reason why honda bikes prefer fuel injection carburetor.
You should use a minimum of 91 octane in street bikes, ATV's or Dirt bikes
Bad fuel, dirt in the fuel filter, dirty air filter.
You can prevent fuel injection flooding by not pumping the gas pedal when trying to start the engine. Fuel injection systems do not need any additional fuel when starting the engine.
1987
2001
Perhaps in 2008?
You need to prime the fuel injection system.
Doubtfull, there was not many bikes in 1987 that were fuel injection. If it has carbs it wont need mass air flow meter as the fuel is mixed in the carb, fuel injection spits the fuel directly into the cyl in which case you need air flow sensor to ensure correct fuel/air mixture.