Europe 2 motorcycle engine that stuff is what
In fact the cycle of a little bit of exhaust gas to reduce emissions to protect the environment is basically no role in response to higher policy only.
Now the policy on Europe 1 motorcycle has been allowed to produce, the market is selling Europe 2 or more environmental standards of the car.
The role is to be part (in fact, only a small part of the exhaust) and then return to the intake pipe, and then into the cylinder combustion (commonly known as secondary combustion) to reduce emissions.
That thing is the legendary exhaust gas recirculation system!
