Wonjan Woes !!

[Luis Carlos]

I've seen those kind of breather pipes on lots of dirt bikes. Never understood why they're used only on them and not on street bikes.
Our bikes have just a tiny air duct built into the cap that lets air into the tank.

hello friends unfortunately not speak English but I want to help
Operation of the system
If there is negative pressure in the exhaust, the reed valve of the air induction system is open and
allows the passage of fresh air, coming from the box of air filter for the exhaust collector.
This process of burning occurs in a range of temperature from approximately 580 to 720 ° C
and significantly changes the volume of hydrocarbons (HC) and carbon monoxide (CO)
turning them into carbon dioxide (CO2) and water (H2O).
This system injects air filter, clean, in the exhaust outlet to help supplement the burning of unburnt gas inside the cylinder.
The working principle is based on the difference in pressure adjustment and the correct mix of
carburetor, which is deliberately impoverished.
This adjustment is made in the factory and should not be changed without the correct use of an analyzer of
gas, unless the regulation of idling through the screw of acceleration.