Changing without the clutch is someting you can get away with in a tihgt situation, should your clutch cable break or the like, but isnt something you should do a lot of...
That kind of abuse can lead to gears shedding teeth destroying the whole gear box and, depending on the engine in question, slivers of metal circulating to other parts of the engine in the oil.
fiveoboy01 wrote:Powershifting = upshifting using the clutch, but the throttle stays wide open the entire time.
Speedshifting = Same as above, but letting off the throttle SLIGHTLY between shifts.
bingo. And speed shifting can be done without damage if done properly. I'd practice on a car myself. A lot of 18-wheelers speed shift and only use the clutch to launch. Same with dump trucks and the sort. I've watched my step-dad use the clutch all of 3 times when he was driving his dumptruck around the propertey and the road brielfy, and that's only as many times as he had to stop. It saves clutches on those things.
In cars, each one I've had with a manual I've practiced going all the way up and down the gears w/o clutch just to know that I can if the clutch fails. And it makes a neat demonstration to those who assumed it's impossible. When done right, it's a smooth seamless gear change.
I've done it by mistake on bikes about 4 times, both up and down, it was an abrupt but crunchless affair. Each time I accidentally hit the shifter while positioning my foot to prepare for a shift.
Changing without the clutch is someting you can get away with in a tihgt situation, should your clutch cable break or the like, but isnt something you should do a lot of...
That kind of abuse can lead to gears shedding teeth destroying the whole gear box and, depending on the engine in question, slivers of metal circulating to other parts of the engine in the oil.
They don't put clutches on vehicles for decoration, and I've seen more than one damaged gear box...
I've done it when a snapped clutch cable left me no option but it isn't something I'd make a habit of, especially when I've got the gear change down to one smooth movement.