Yes of course, in theory it is possible to electrically supercharge.
Aftr all, any supercharger is a mechanically-driven device that could be driven electrically if the power of the electric motors is strong enough.
The matter of a fan doing this is quite different, but a small amount might be possible, such as the E-Ram product claims.
They claim 4-6% gain.
The fan motor uses 1 hp, at least, in electrical consumption.
So, let's say we look at the Bullet.
What's 5% of the Bullet power?
A normal stock Bullet produces about 16hp at the rear wheel.
5% of that would be about 3/4 of a hp.
Okay, let's look at a typical Bullet like most people ride, with a free-flow exhaust and free-flow air filter, with a carb re-jet. That's about 20hp.
5% of that is 1hp.
So, assuming we actually did get the 5% gain that they claim, and could find some way to get our alternator to produce about 10 times more power than our alternators can put out, we could get 1hp out of it. And that also would equal the approximately 1hp of electrical consumption that it would take to power the electric fan.
This yields a net gain of zero.
However, if we had a 5-liter engine and got maybe 15hp out of the fan system, then the 1hp loss from electrical consumption might be more negligible. But in our case, we only get one hp out of it, and it takes one hp of electricity to power it, so for us it's useless.
However, this is not to say that improved air pressure in the airbox is useless.
It is known that almost all air intake systems with filters cannot maintain full atmospheric pressure during hi-demand riding such as racing or wide-throttle applications.They actually run at a few psi less than atmospheric, because the engine is sucking in air so quickly that the rest of the intake system can't keep up with demand, and the result is that the airbox runs at a few psi below atmospheric pressure, which impairs the ability of the engine to breathe by some percentage.
Simply by bringing the airbox up to normal pressure, and alleviating that few psi vacuum depression in the airbox, can give a similar result of power increase WITHOUT any actual boost of pressure over atmospheric.
This is the type of thing that a Bullet could gain from.
And that is achieved simply by keeping the airbox from going lower pressure than atmospheric. it doesn't require "boost" to achieve some gains, in most cases.
And basically, that is how "Ram-Air" works. Ram-Air doesn't really provide any "boost". It just helps to give enough pressure into the airbox that it doesn't go negative below normal atmospheric pressure. And it works, and you can feel it.
Now, for the "leaf blower" thing.
We certainly couldn't power an electric leaf blower off our alternator either.
BUT...
if we were to use a gasoline-powered leaf blower with a little 2-stroke engine running it, and used that for a supercharger, we wouldn't be taking any power away from our engine.
So, assuming the gas-powered leaf blower had enough air output to work, and it is "self-powered" with its own engine, then we might see something out of that.
And if we were to hook-up some sort of variable throttle to the leaf blower engine, which corresponded to our motorcycle engine throttle cable, we could "tune" the output of the air from the leaf blower, so that it progressively blew more air into our engine as the throttle positions got further open.
I think it woud be a little "wierd", but it could probably work if you wanted to strap a gas-powered leaf blower to your Bullet.