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By Basem Wasef, About.com Guide to Motorcycles

Say it Ain't So: Motorcycles Pollute 10 Times More Than Cars!

Wednesday June 11, 2008
Smoking Motorcycles

Susan Carpenter of the LA Times is apologetic, for she bears some bad news for those wrongly under the impression that motorcycles are win-win regarding all things environmental. Though bikes can be twice as fuel efficient as cars, Carpenter's column elucidates the fact that the ability of bikes to extract more power from gasoline also means that they emit more smog causing oxides of nitrogen.

John Swanton of the Air Resources Board is quoted as saying, "The emissions picture [for motorcycles] is fairly grim," but he goes on to say that "we think it's fair for where motorcycles are today." With Euro III and CARB restrictions already clamping down on bike emissions and the EPA setting tougher standards that will take effect in 2010, the article suggests there are no immediate plans for further government regulation.

As I've stated before, I can't attribute the fact that I ride to a noble, earth-saving instinct, but I'll also admit that this news comes as a bit of a surprise to me. How about you?

Photo © John Foxx / Stockbyte
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Comments

June 11, 2008 at 8:59 am
(1) busfreak says:

We are all going to be like the Amish if this going green keeps up. Where is it going to stop. Here I am riding my bike to help and now that isn’t good enough. The picture really helps with all the smoke.

June 11, 2008 at 9:09 am
(2) TEvo says:

For years, EPA has cited motorcycles as being more polluting than cars. Catalytic converters and emissions compliance are a fairly new thing on motorcycles. The vast majority still don’t have anywhere near a modern automobiles emissions control equipment.

And with a considerable number of motorcycle owners removing emissions equipment (PAIR and catalytic converters) and installing aftermarket exhaust systems… the reality is a bit harsh.

June 11, 2008 at 9:16 am
(3) Demonio Pellegrino says:

Well, unfortunately this is true. if we think that a motorbike consumes and emits almost as a car, even if it is 5-6 times lighter in terms of weight, you need to wonder…

however, you also need t count in the fact that with a bike you save time - thus you save fuel - as you can skip traffic.

You need to think about the whole picture.

June 11, 2008 at 5:43 pm
(4) Pete says:

I wonder as well if a 600cc motor actually pollutes more than a 1.8L LEV / ULEV car motor - or - if it pollutes more by displacement - thus actually pumping far less than a car in to the atmosphere?? Fer damn sure it pollutes a lot less than a 400″ V8-osauros!
I think before they start bitching about bikes, let’s get the Hummers, Escalades and Aviators off the road.
And what idiot though it was a good idea to use the photos with the TIRE smoke?? Let’s have a litlle honest reporting…

June 11, 2008 at 8:39 pm
(5) TEvo says:

Not sure but I believe motorcycles of any displacement pollutes more than any passenger automobile.

I think light trucks are applied different standards so the same statement cannot be applied to to this class of vehicle.

The emissions standards for motorcycles are simply more lax than for passenger autos. Emissions standards are measured in grams per kilometer so I think displacement is not a factor.

June 12, 2008 at 9:49 am
(6) markk53 says:

I would really like to see the numbers. It is not hard to believe that a bike can put out more pollution in PPM, but with cat converters starting to be the norm more than the exception and most bikes being in good state of tune, I really wonder.

I also noticed the comment about what oxides of nitrogen are emitted. It seems that there is some similarity between fertilizer and oxides of nitrogen. And if I remember right the main issue here is acid rain. If so, go look up what information you can find on the EPA’s own 10 year $300,000,000 study of acid rain. You won’t find it on the EPA site because the real research information didn’t fit their preconceived answers. If you want the real stuff Google “the EPA vs Ed Krug” and find out what was conveniently buried.

By the way, one document from 1989 found no deaths caused by sulfur dioxide pollution, I wonder if it’s the same for those oxides of nitrogen.

June 12, 2008 at 10:24 am
(7) Scottie says:

Look, I’m a big fan of the air cooled v-twin, but it’s a no brainer that it’s spitting out a lot more junk than than a modern automobile engine.

June 12, 2008 at 11:05 am
(8) Basem says:

Folks,

Regarding the picture, it is intended to be a comically overstated image rather than a literal representation of the story… lighten up, fer Pete’s sake!

:-)

Basem

June 13, 2008 at 7:55 am
(9) j cat says:

m.c.s, as they come from the factory are quite good as they do comply with the epa standards. However when I tried to get more out of my V-Max I had to change the pipe and jetting and use my exhaust gas analyzer to get that engine to put out more CO. It’s not easy or cheap to get your bike to pollute the way you want it to do.

June 17, 2008 at 3:06 am
(10) Incredulous says:

Basem,

Where are the numbers? Where is the data? The source, or are you just parroting some urban myth?

Have you compared the ULEV, LEV2, BIN8, EU II/III and US regs for car vs. bike?

OR, is this an exercise in hyperbole?

Seriously. Let’s see the math.

- I have a calculator and I’m not afraid to use it.

June 17, 2008 at 3:30 am
(11) motorcycles says:

Hello Incredulous,

The source– the LA Times– is linked within the first line of the post. I do not claim to have made the calculations myself; I am citing the Times story.

Basem

June 17, 2008 at 10:43 am
(12) Susan says:

That is why we need CHP and local police to enforce and ticket illegal exhaust systems for motorcycles and cars. They make too much noise and they pollute the air. Let’s get the bad guys and not critize everyone.

Bottom line, don’t replace the original exhaust. Illegal exhaust are legal to sell but illegal to use. Big business is still allowed to make money even though they know that these modified mufflers are illegal.

Our government only cares about making money and taxes. Stop illegal modified mufflers.

June 18, 2008 at 11:58 am
(13) Brett says:

Susan, are you serious?? when did this discussion become about banning illegal exhausts… Anyways, sure I believe that motorcycle pollute more but like was mentioned in a comment above, If more people rode motorcycles, that would equal less traffic, thus creating less pollution in the long run. Also, we have to look at it this way, by using fuel efficient vehicles, ie motorcycles, we are prolonging our fuel resources =) So I figure by riding, Im doing my part…

June 18, 2008 at 12:27 pm
(14) Michael says:

This just sounds like another anti motorcycle BS artist safety pin head spouting more anti motorcycle propaganda! Hey, ignoring a problem and acussing those who disagree works for me!

June 18, 2008 at 12:32 pm
(15) Michael says:

Oh yeah, important point, do they mean per vehicle or per cubic inch of engine? It would make a big differnce and it’s important to know exactly what they are talking about.

June 18, 2008 at 1:00 pm
(16) Ron says:

Sounds like a plot from the BIG oil companies to keep people off MCs and in gas guzzler cages. What’s next - lawn mowers, chain saws, weed eaters, ……??? Extremist LA going for the finger pointing.Too many bikes splitting traffic and getting through faster than their Porsche and Lamborghini, how do we get them off the road? Come up with some hype that they pollute more than cars?

The Japanese are trying to patent a water powered engine, Honda no less, Maybe it will make it to motorcycles before the SUVs.

June 18, 2008 at 1:34 pm
(17) lynx says:

I feel this is more conjecture than real “facts” and a push by the same folks that market catalytic convertors. “follow the money trail” on this one… especially since it came out of LA, Califonyus!

June 18, 2008 at 2:52 pm
(18) bobcat says:

The environmental fascists will never be happy. Even if we all end up Amish, as suggested before, they’ll be after us regarding the methane produced by the horses. My bike gets four times the gas mileage as my pickup does, and they’ll still tell me I’m evil. I will happily direct them where to insert their concerns…

June 18, 2008 at 4:19 pm
(19) Bonnie says:

Just more people jealous because they don’t have a motorcycle, or their mother would not let them ride one,or they can’t even balance a bicycle. In other words just plain bull****.

June 19, 2008 at 12:42 am
(20) FrankG says:

Why don’t you guys just leave us alone and go after some real problems … SUV’s for example… they consume 3 to 4 times more resources (gas, tires, etc), use at least 10 times more road and parking space and usually carry only one person…
Get a life!

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