typically you want a a smaller sprocket in back and bigger one in front..
bigger one in back with stock in front will cause quicker acceleration
small on back and big in front will cause you more speed but if you put a smaller one in back put a bigger one in front
no
X1 is taller and little bigger but x7 is faster.
It's no guarantee that it will, it all depends on what you want to achieve. A bigger sprocket will make it easier to get the bike up, but you will have to pedal faster once you're there.
It really depends on what kind of bike you are getting, but normally, a pocket bike is bigger.
how to make a pocket bike faster.
take parts off that u dont need to make the pocket bike go faster LOOSE SOME WEIGHT OR BUY PERFORMANCE PARTS remove the muffler, remove plastic pieces that are not needed, bore out the cylinders and get bigger pistons, swap sprockets or get a smaller rear sprocket. (this will make it slower off the line but significantly increase top speed. just like a mountain bike in low gear)
No way of telling, it depends on how strong or high revving the engine is. Switching to a bigger front sprocket might make the bike faster, but only if the engine is strong enough.
Buy A Bigger one
Lose weight.
A bore kit does not make a bike faster. It makes the engine more powerful if you want to go faster you must work on gear ratios and or sprocket sizes.
There's no set answer to that, it depends on what your preferences are. If you want a bike that's easier to get moving - get a lower gearing(bigger sprocket). If you want a higher top speed - get asmaller sprocket.
What you can do is on most of the pocket bike carburetors there is a little screw that you can a dust that will increase the speed
If it's a singel speed, or internally geared bike it might very well be called a sprocket. If it has external gears it's either a cassette or a freewheel. It might eve be a freewheel with only one sprocket on it.