Join Date: Aug 2008
Location: Topeka, KS, USA
Re: Hypothetical emmissions question
The EVAP system is there to capture gasoline fumes generated in the fuel tank by such factors as agitation and heating. Those vapors are captured in the charcoal canister and then burnt off in the engine which pulls a small amount of air through the canister. I doubt that any emissions test would look at the EVAP system on a motorcycle as it (the EVAP) should not affect the tailpipe emissions. In cars and trucks model year 1996 and newer the inspector simply hooks up to the OBDII system to verify the presence and proper operation of the emission control system. Since motorcycles are exempt from the OBDII requirements, most have little if any emissions systems. To my knowledge, BMW is the only motorcycle built which uses a catalytic converter system so they are way ahead of the game compared to everyone else. I suspect that for a BMW with a canisterectomy to fail any potential emissions test, every other brand of cycle would be off the road.
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