what is slap shifting? And how do I do it?

Answer 1

Cut the throttle, shift without using the clutch, hit the throttle, hang on.

Answer 2

What you call "slap shifting" is usually called "floating the gears". It means shifting without the clutch. The trick to floating is to release the throttle quickly. This unloads the torque holding the trans in gear for a second or so. During that second,do your shift and the tranny will slip into the next gear. It is a great technique to know on a bike or other motor vehicle as you are not stuck in the boonies. If you lose a clutch or clutch cable you can still get the vehicle to a repair shop. Be advised that if you wait too long to do the shift you put undue strain on the edges of the tranny gears as they pull apart. You won't blow out the gears, but done enough times wrong, the gear edges will wear. I use this techique on everything from bikes to 18 wheelers. Remember to be in neutral if you have to come to a stop with an unusable clutch. Either roll start and pop it into 1st or shut off the engine, put the tranny in 1st and hit the starter. (hang on!!)

Answer 3

I've never heard of slap shifting. "Power shifting" sounds like the better way to go.
Throttle WFO (wide f'n open). Never let go.
Fan the clutch lever (between - touch it & 1/4 for a split second) while up shifting.
A better way to explain the clutch action - put & keep upward pressure on the shift lever. A quick touch of the clutch lever until it goes into gear and let go of the clutch.

Answer 4

Most people call it floating. I use an air shifter on the super bike.