0:02 the clutch is one of many essential
0:04 components of a motorcycle it is
0:07 operated by pulling or releasing the
0:10 clutch lever with the left hand before
0:12 going into the details on working of a
0:14 clutch let's see how it is assembled in
0:17 motorcycles the power from the engine is
0:19 converted to rotary motion by the
0:22 crankshaft as shown this power is then
0:25 transferred to clutch housing the clutch
0:27 assembly transfers power to the input
0:30 shaft of the gearbox the power is then
0:32 transferred to the output shaft and
0:34 eventually to the rear wheel of the
0:37 motorcycle the clutch assembly itself is
0:39 a combination of several parts it
0:41 consists of a pressure plate held in
0:43 place by using several springs and
0:46 screws this plate presses against the
0:48 clutch pack the clutch pack consists of
0:51 several steel and friction plates placed
0:54 in alternate positions the clutch basket
0:55 and the inner hub are assembled with
0:58 their axes aligned to the input shaft of
1:00 the gearbox now let's understand how a
1:03 clutch works the clutch basket
1:06 freewheels with respect to the gearbox
1:08 the engine power will spin the clutch
1:10 basket but it will not transfer any
1:12 power to the gearbox
1:15 however the inner hub is connected to
1:17 the input shaft of the gearbox if we
1:19 spin this inner hub then it will also
1:23 spin the gearbox input shaft let's take
1:25 a hypothetical connect with teeth on its
1:28 internal and external portion that can
1:30 interlock with both the clutch basket
1:32 and the inner hub if we insert this
1:34 hypothetical connector between the
1:36 clutch basket in the inner hub then we
1:38 can spin both of these at once and the
1:41 engine power reaches the gearbox and if
1:43 we remove this hypothetical connector
1:45 the clutch basket and inner hub will be
1:48 independent again and the engine power
1:51 is disconnected but there is a problem
1:54 in using this connector when the
1:56 connector is removed the inner hub spins
1:58 due to inertia of the motorcycle rear
2:01 wheel and the outer basket spins due to
2:03 engine power this is why these two
2:06 components start spinning at different
2:09 speeds in order to interlock with both
2:11 of these non synchronized spinning
2:13 components the hypothetical connector
2:13 will have
2:16 spin at two different speeds at the same
2:18 time which is impossible for example if
2:21 it matches the inner hub speed then
2:23 interlocking this connector with the
2:24 outer basket will be either impossible
2:28 or too difficult to eliminate this
2:31 problem the clutch pack is used in place
2:33 of this hypothetical connector unlike
2:36 our hypothetical connector the clutch
2:37 pack is a combination of separate
2:39 circular plates
2:42 let's take any two adjacent plates from
2:44 the clutch pack one of them is a
2:46 friction plate and the other is a steel
2:49 plate the friction plate has teeth on
2:51 the outer circumference which always
2:53 interlocks with a clutch basket and can
2:55 slide sideways along this clutch basket
2:58 the plate spins with the clutch basket
3:03 but doesn't affect the inner hub the
3:05 steel plate has teeth in its inner
3:08 portion which always interlocks with the
3:10 grooves in the inner hub and can slide
3:14 sideways along this hub this plate spins
3:15 with the inner hub but doesn't affect
3:19 the outer basket as these plates can
3:20 slide sideways we can press them
3:23 together gradually increasing friction
3:25 so that both of them start acting like a
3:27 single unit like our hypothetical
3:31 connector with this arrangement if we
3:33 spin the outer basket the inner hub will
3:36 also spin this will eventually transfer
3:39 power from the engine to the gearbox
3:41 even if the plates are spinning at
3:44 different rpm at first the gradual
3:45 increase in friction between them will
3:49 eventually synchronize them if we
3:51 release the pressure the two plates
3:54 become independent this will disconnect
3:56 the inner hub with the clutch basket and
4:01 the engine power is disconnected several
4:03 other plates are added to increase
4:06 strength and surface area now let's
4:08 understand how pressure on these plates
4:11 are changed while riding a motorcycle we
4:13 use the pressure plate for this purpose
4:16 it has ducted attachments where a set of
4:19 Springs can fit in
4:22 a set of retainer bolts are screwed to
4:23 the inner hub
4:25 this causes the spring to compress and
4:28 apply force on the clutch pack resulting
4:29 in sufficient friction between the
4:34 plates we can release the pressure on
4:36 the clutch pack by pushing the pressure
4:39 plate outwards we can control this
4:42 pressure by pulling or releasing the
4:46 clutch lever as the clutch lever is
4:50 pulled or released a cable or hydraulic
4:53 system rotates an actuator arm as shown
4:56 in the animation this arm presses
4:59 against the push rod towards the clutch
5:02 this rod goes through a duct inside the
5:04 input shaft and pushes the pressure
5:07 plate releasing the pressure on the
5:10 clutch pack when the clutch lever is
5:13 released the springs again apply
5:15 pressure to the clutch pack as shown in
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