09-29-2016, 06:28 AM
There are 2 shafts in the gearbox, getting connected by different combinations of gear wheels.
The 1. shaft is driven by the engine, connected by the clutch. The 2. one is connected to the rear wheel by the chain.
In neutral 1. and 2. shaft gear wheels are not connected. However, the 1. one is spinning, driven by the engine, even if you open the clutch, as there is still friction in the clutch caused by the surrounding oil. The 2. one is standing still, as your rear wheel is standing still.
Now, when you engage 1. gear, you make a connection between 1. and 2. shaft by the corresponding (1.) gear wheels. Now the spinning 1. shaft gives its rotating energy to the 2. shaft and gets stopped abruptly, as the 2. shaft cannot spin, as the rear wheel is still standing still, brakes engaged.
That is the moment of the <clonk>. From now on, the 1. shaft is also standing still, separated from the engine by the clutch. No, when you close the clutch, the engine will drive the whole engagement forward.
That's also the reason, why you get no <clonk>, when you engage 1. gear while still rolling.
HTH.
The 1. shaft is driven by the engine, connected by the clutch. The 2. one is connected to the rear wheel by the chain.
In neutral 1. and 2. shaft gear wheels are not connected. However, the 1. one is spinning, driven by the engine, even if you open the clutch, as there is still friction in the clutch caused by the surrounding oil. The 2. one is standing still, as your rear wheel is standing still.
Now, when you engage 1. gear, you make a connection between 1. and 2. shaft by the corresponding (1.) gear wheels. Now the spinning 1. shaft gives its rotating energy to the 2. shaft and gets stopped abruptly, as the 2. shaft cannot spin, as the rear wheel is still standing still, brakes engaged.
That is the moment of the <clonk>. From now on, the 1. shaft is also standing still, separated from the engine by the clutch. No, when you close the clutch, the engine will drive the whole engagement forward.
That's also the reason, why you get no <clonk>, when you engage 1. gear while still rolling.
HTH.