bigger cyliders, bore out the engine, make it lighter
how to make a pocket bike faster.
it depends on how on how fast you petal and how fit you are
it will make you faster, but only if it is streamlined. other than this it protects your head if you fall off your bike.
The fastest available street legal bike is the Suzuki Hiyabusa. This motorcycle has a top rated speed of 194 miles per hour.
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.
Maybe
Replace the motor.
Twist the grip.
Lose weight.
You don't.
You can't
put a bigger engine in it!