Carburettor tuning of motorcycle, Mechanical Engineering

Assignment Help:

Carburettor Tuning : It is very important that the carburettor is tuned properly to attain the best fuel efficiency and performance of the motorcycle. Since air screw is factory pre-set hence it is advised not to alter the setting unless required.

STEPS

Air screw is reset for some prominent problem or when the complete carburetor is serviced.
To tune the carburettor, the air screw is completely closed. Then it is opened 1.5 turns.
The engine is allowed to run for 4-5 minutes.
With the help of throttle stop screw, the engine r.p.m is increased.
Now the air screw is adjusted to attain maximum r.p.m, one must use a tachometer to measure the reading.
Now with the help of throttle stop screw, the engine r.p.m is set to 1300-1500 rpm.

Important points to remember:

Tune the carburettor when engine is warm.
Always use tachometer.

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