YOUR CLUTCH

There’s a lot go­ing on in there...

Motorcycle News (UK) - - Garage -

Neil Spald­ing, Owner of Sigma Per­for­mance, Sigma Per­for­mance make slip­per clutches for race bikes around the world, and Neil was for­merly Eurosport’s Mo­togp tech guru.

Your clutch is a tap, trans­mit­ting power from the en­gine to the gear­box. With no clutch you can’t stop the flow of power, so can’t change gear or stop without stalling.

Most clutches have mul­ti­ple fric­tion plates made from a ma­te­rial sim­i­lar to brake pads, with plain steel plates in be­tween, all held tightly to­gether by heavy springs. The fric­tion plates spin with the en­gine, the steel plates spin with the gear­box, so when you pull the clutch lever the springs re­lease the pres­sure, al­low­ing the plates to spin in­de­pen­dently.

There are two types of mo­tor­cy­cle clutch, wet and dry. Dry clutches run without oil so are lighter but are less com­mon. Most mod­ern bikes run wet clutches, which are lu­bri­cated

by the en­gine oil. This can shorten the life of the oil but makes the clutch smoother, qui­eter and run cooler. Some Euro­pean bikes like Moto Guzzis and BMWS use a dry, sin­gle-plate clutch much like a car.

‘Heav­ier clutch springs are needed for faster rid­ing or track­days’

In a wet clutch, oil is used to make the chang­ing of gears smoother and qui­eter Su­per­sport teams re­place clutch parts ev­ery week­end

Your clutch needs to be checked reg­u­larly 3 2 1 4 6 2

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