Why the engine goes off when I am speeding on my Bajaj Pulsar?

Bajaj Pulsar comes with a red RPM mark in each of its motorcycle. That denotes the maximum rpm limit, within which the bike's engine will cease its function and come back only when the speed comes under the given limit. The auto shut function saves the engine from blowing up due to very high revolutions. If the bike goes off at relatively lower speeds, the problem may be in the spark plug, which does not provide proper ignition to the mixture of fuel. The chip controlling the rpm can be deactivated but will surely cause a loss to the engine in some time. That will also end the warranty of the bikes engine.