Who have this exhausts system on there 4 stroke scooter? http://picasaweb.google.dk/kan...

I think its a turbo system
2 tubes makes the exhausts gas goes back too the cylinder and piston
Making it run like a 2 stroke engine but with less petrol use.

If it`s not a turbo what is it ?
It麓s compress the air from the combustion
And reuse it for a second time

What you are describing is mechanically impossible. You cannot 'reuse' the exhaust gas on any engine by sending it back into the combustion chamber.

What the picture shows is NOT a turbo-charger.

Any 50cc should be good for 120mpg+. So nothing unusual there.

Any de-restricted 50cc should be good for 50-65mph. So nothing unusual there.

No one you are making this up I am sure

lol its a chav machine.

its just like a bolt on exhaust that you see little nova's and fiesta have that are drvien around by 17 year olds to make the car sound like a beast.