#QUICKSHIFT VS REGULAR SHIFT DRIVER#
#QUICKSHIFT VS REGULAR SHIFT FULL#
#QUICKSHIFT VS REGULAR SHIFT FREE#

#QUICKSHIFT VS REGULAR SHIFT FULL#

These allow gear-shifts under full power. I you are worried that clutchless changes are bad, then you might be reassured to know that my 2004 Yamaha R1 has done 105,000 miles (with very little motorway use) with me shifting that way, and is still on the original gearbox and clutch.Īn interesting development in MotoGP is seamless gearboxes.

This only works on up-changes, but cutting the spark rather than closing the throttle means that there is less disturbance to the air-path and the power comes back faster. So, all that a quick-shifter does is measure the force on the shift lever and turn off the spark plugs when the lever is operated. This needs a certain dexterity to operate the throttle and brake at the same time. You need to press on the lever and momentarily open the throttle. You just need to apply a gentle pressure to the lever, momentarily close the throttle, and the gearbox shifts smoothly and very quickly into the next gear.ĭown-changes are more difficult to do smoothly, as you are typically loading the gearbox backwards and braking at the same time. Many motorcyclists (myself included) hardly ever use the clutch for up-changes. Because of the sequential cam mechanism only a very small and fast movement of the lever is needed.

#QUICKSHIFT VS REGULAR SHIFT FREE#

All you need to do is unload the gearbox so that the dog-clutches are free to slide on their splines while moving the gear change lever. This means that it is possible to do very fast gearchanges on a motorcycle without using the clutch. The sequence in which the dog clutches slide is controlled by a cam drum connected to the shift lever. The dog clutches slide on splines on the shafts. The gearchange mechanism moves dog-clutches around to alter which gears are locked to the input and output shafts. The gears in a motorcycle gearbox do not slide on the shafts to engage and disengage gears, the gears are constantly engaged with each other but at least one of each pair is free to rotate on its shaft. It might help to understand how a motorcycle gearbox differs from the traditional design that you will see in most explanations. The first answer is good and rather complete, and I would have added this as a comment if I had the reputation.

#QUICKSHIFT VS REGULAR SHIFT DRIVER#

Whereas an unskilled driver manually operating the clutch is more likely to make the mistake of leaving the throttle open during up-shifting. The general consensus on the internet seems to be that quick-shifting can be less harmful for the gearbox than slow-shifting since the engine power is guaranteed to be lowered when the fuel/ignition are cut. Is Quick-Shifting Harmful for the Gearbox? In this case you have one cable for each sparkplug which suggests that this unit cuts the ignition when quick-shifting.

It looks something like this:Ī quick-shifter circuit typically looks like this: The quick-shifter is usually a sensor reading the position of the shifter, informing a microcontroller of when up-shifting takes place in order for the controller to cut the fuel/ignition. Just to give you an idea of how fast a quick-shifter can operate, see this video of a quick-shifting ZX10. All of this happens without the need to close the throttle. The way this is done is usually by momentarily cutting fuel and/or ignition for a few tens of milliseconds during which the gear is engaged. There are many types of quick-shifters out there and not all use the same methods although they all aim at achieving a common goal: reduce load on the drive-train to safely engage a higher gear without damaging the gearbox. Now, this is a time-consuming process ( a few hundreds of milliseconds) which might be undesirable in a racing environment where every fraction of a second counts. When you slow-shift you usually close the throttle, disengage the clutch, act on the gear shifting pedal, engage the clutch and reopen the throttle. Since these are called quick-shifters we'll dub slow-shifting the traditional way of shifting gear.

Quickshift vs regular shift