Quote:
Originally Posted by djb383
If it reduced air flow, wouldn't it cause these engines to run rich? They run very lean and very clean, ULEV II. The second/upper filter catches fumes that escape from the intake/throttle body when the engine is OFF.
|
Motorcycles are even more strict than cars for ULEV and on the dyno they are actually pig rich to meet emissions for some reason. I think it does catch some of the back vapors though like you said...