When you let go of the clutch lever, the lifter rod moves back in place, allowing the clutch springs to compress the pressure plate onto the clutch pack. The friction discs, as the name implies, produces friction against the clutch plates and they rotate together in unison, as with the clutch inner. Please click here for the full article.
Slipper clutches work on the same principles when under power. Under hard engine deceleration, the ramps are forced together which then pushes the pressure plate off the friction plates and clutch plates; in effect decoupling the engine and transmission. This allows the use of softer or fewer clutch springs. Consequently, the clutch lever needs a softer pull. Before we close, a wet clutch is bathed in oil for cooling and lubrication.
As we mentioned in an earlier article , DO NOT use automotive oil in a motorcycle engine as the clutch will start to slip and wear them out abnormally. Please use engine oils with MA or MA2 rating. You may also wonder why cars use only a single pressure plate and friction disc compared to motorcycles. The answer is space. This design keeps everything aligned, but also allows for movement between the drive disc and the releasing disc. The clutch springs provide the friction between the fiber plates and the steel plates by sandwiching them between the drive disc and the releasing disc.
When the clutch is engaged, the spring pressure is strong enough to hold all the plates together without any slippage. Remember that the fiber plates are not locked to anything, so without this pressure they could spin. As the fiber plates wear over time, the clutch spring screws can be tightened to take up slop and restore spring pressure.
This entire unit is often referred to as a clutch pack. Transmission side of the clutch pack with the clutch springs and clutch spring nut sectors visible. The last major component of the clutch assembly is the clutch basket which, as the name suggests, holds the clutch pack. On the inside of the clutch basket are keyways that match the keys on the outside of the fiber plates.
These lock the fiber plates to the clutch basket, but just like the keyways on the releasing disc, allow the fiber plates to move up and down.
A gear runs around the outside of the clutch basket which is connected to the engine typically by a chain or belt.
In this particular example there are two gears on the clutch basket as a double row chain is used to connect it to the engine. So now we have a complete clutch where the steel plates are locked to the releasing disc, the fiber plates are locked to the clutch basket, and the whole thing is spinning around via a chain attached to the engine.
This entire assembly is mounted on a set of roller bearings that rides on the transmission's mainshaft. The mainshaft also has a keyway yes, another keyway that locks the drive disc to the mainshaft. This is the typical state of the clutch when the lever or foot pedal is released and the clutch is engaged.
With everything locked together, the engine turns the clutch basket, which turns the clutch pack inside of it, which turns the mainshaft on the transmission. To disengage the clutch, the clutch plates need to be separated from one another. Since the fiber plates are locked to the clutch basket and the steel plates are locked to the releasing disc, if the plates are pushed apart the clutch basket can continue to spin while the steel plates, releasing disc, and drive disc are all stationary.
Once the drive disc stops spinning, the mainshaft also ceases to move and no more power is being transmitted from the engine to the transmission. To accomplish this on my VL, there is a rod which goes through the mainshaft, known as the clutch pull rod. On the clutch side of the transmission, it is attached to a three legged actuating plate whose legs pass through slots in the drive disc and press against the releasing disc.
In this article we will take a look at where the clutch controls are located on a motorcycle. You will find that the vast majority of motorcycles will have these controls in the same location. Where is the clutch on a motorcycle is a common question as most people are used to a manual or stick shift car setup where the clutch is operated by pressing on a foot pedal, so you can understand their confusion when they first get their motorbike license and are confused.
On a motorcycle you will find that all of the controls are set out much differently. The photo below is of the left hand handgrip of a common motorcycle. The clutch is the metal lever.
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