I have studied that, RPM is the measure of how fast the Crank Shaft is rotating.
Lets consider the following case.
- You are riding in some speed which shows the engine at 5000 RPM.
- Now you are closing the throttle and pull in the clutch.
- Now the tachometer shows the RPM reading as close to idle (like 1.5k to <2K)
- When you again engaged the clutch (Still throttle is closed) the RPM will regain again close to 5000 RPM (since we have dropped some RPM by closing the throttle)
But the above case clearly says that, still the crankshaft is rotating. By why in this case, it shows/have to show a different RPM range.
I am having Apache RTR 180. I have tested this in some same models and all are reproducing this same scenario.
May I know, Is there any kind of advantage/use in doing this one.
The following clarification/understanding is added in the question itself, since unable to add big text in the comment.
*PS: So, What my understanding is:- Lets consider "X" amount of fuel/air is passing in idle RPM range and "y" be at some 5K RPM. So, rear Wheel is connected to the crank shaft. A movement in crankshaft will have effect in the rear wheel and vice versa too. So, when the clutch is pulled in (and throttle is closed completly), since of the limited air/fuel supply (x), it maintains the idle RPM range. When the clutch is engaged again (still throttle is closed), that same x is maintained since, we are not giving throttle.
Q1. Only the rear wheel plays a vital role in making the crankshaft to match its speed at this entire case right?
Q2. I believe for the FI, it will supply the same "x", since the TPS will say "no throttle is given at the moment" right? *