NOTE: The sequential manual transmission (or sequential manual gearbox) is a type of manual transmission used on motorcycles and high-performance cars for auto racing, where gears are selected in order, and direct access to specific gears is not possible.
With traditional manual transmissions, the driver can move from any gear, to any gear, by moving the shifter to the appropriate position. This type of transmission is often referred to as a H-pattern because of the path that the shift lever takes as it selects the various gears. A clutch must be disengaged before the new gear is selected, to disengage the running engine from the transmission, thus stopping all torque transfer. In auto racing, this process is slow and prone to human error; hence the development of the sequential transmission. A true sequential transmission will very often use dog clutch engagement rather than the more usual syncromesh as fitted to a normal H-pattern road car gearbox. Engagement using dogs only requires a very brief interruption of engine torque to complete a shift into any adjacent gear. This allows shifting between gears without the use of the clutch. The clutch would normally be used only for standing starts.
Is it true that gears can be shifting without using the clutch on a motorbike, and any negative effects?
You can do this on most bikes if you match the engine speed to the new gear to be engaged. It will produce accelerater gearbox wear particularly to the undercut selector dogs and as you will not be racing on the road there is nothing to be gained from it so no point doing it.
Is it true that gears can be shifting without using the clutch on a motorbike, and any negative effects?
Definitely possible, both up and down (with practice).
The reason it can be done on a m/c more easily is that bikes have a reduction gear between the engine and transmission (called the %26quot;primary drive), which reduces the gearbox rotation by up to a factor of 3. Since the 'box is only rotating about 1/3 as fast as the engine, and is a constant-mesh design with (as you say) dog clutches, clutchless changes can be easily effected BUT......... it's better if you nip the clutch just a little. You don't have to fully disengage it; just enough for a bit of slippage. In spite of what most people will probably tell you, after a while this partial disengagement thing becomes second nature, and you'll find yourself making changes as smoothly as an auto box.
Certainly it is possible, I do it a lot.
No bad effects as long as you use the throttle properly to synchronize the gears and engine speed.
It will make you a better rider. I shift without using the clutch in all my vehicles, motorcycles, truck, and car, no damage at all, ever.
I don't do it just 'cuz I want my bike to last, metal frags will ruin your trans. But if you don't care I don't care, and those rice-burners get bought and sold all the time after they've been beat to death. I ride a classic that I plan to keep 'till I die. (It's a '48 that's still going strong.)
i have a nice old classic bike with a shaft drive.
the clutch works so i use it.
i dont recommend not using it as i dont like a heap of metal dust accumulating in the transmission with the obvious consequence things are just going to get from bad to worse.
i would only grudgingly approve if you had fallen of and had to get home due to location or a snapped clutch cable and cannot be bothered to change the cable from the front brake over (mine fits)
to sum it up
if the clutch works, use it ,anyone is mad not to.
bikes are not like trucks where this not using the clutch is common.
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