Imagine what would happen if you put the throttle on the left? The scooter is nothing more than a matter of habit, although it will be a bit twisted, but still able to adapt.
And cross a bike can not operate at all, because you pull clutch when virtually sure to fuel the door, under such a premise how can the vehicle to achieve a smooth start, smooth shift, gear down deceleration?
If you can't get this picture in your head, take a look at the throttle and the clutch. What are their functions?
Clutch main role is to pass and cut off the power generated by the engine, it is equivalent to a slow down in the process of marching device, and throttle is to control the engine speed, it is equivalent to an acceleration device, if a device speed and slow down together at the same time operating, smack of a contradiction?
See here some cars may say, front brake and throttle are also together? It is true that the front brake and throttle are operated with the right hand, but in practice the right hand is more friendly to most drivers and has far more flexibility than the left. (don't check with a real car. The front brake and accelerator must go together.)
And before the use of the brake force, will not be as big as the clutch, the whole use of the process is not need to squeeze to the end, so as long as you hold the correct posture, you can fully throttle the throttle handle, in the use of the brake can ensure that the throttle does not accelerate.
And clutch and throttle together will fight each other, you lock throttle handle, virtually will be less a helper, under the premise of three fingers is not easy to pull the clutch operation handle, unless you love the car clutch no resistance, but in fact most models of clutch are relatively heavy.
And if four fingers to pull the clutch, it is impossible to lock the throttle, such a design will undoubtedly make the whole operation more complicated, there will be a certain safety hidden trouble.
Design through the introduction of more than you can see the motorcycle throttle on the right side, mainly for more convenient operation, and also will become more reasonable, the design whether to start at ordinary times, or a normal shift, and half linkage under special conditions, most people would be more suitable for the operation of the habit, so the motorcycle clutch, throttle, brakes and other operating system design is reasonable.