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 Post subject: Emissions of motorcycles
PostPosted: Fri Sep 22, 2006 13:45 
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Is there a list of CO2 emissions from motorcycles anywhere? Ideally over the last 10 years.


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PostPosted: Fri Sep 22, 2006 16:00 
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I doubt it. No need for the information. Bike homologation does not require manufacturers to measure Co2.

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PostPosted: Fri Sep 22, 2006 21:30 
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Interesting, I wonder what the CO2 output of say, a Honda CBR600 would be compared to cars (I'd expect it to be very high when they are being ridden hard)


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PostPosted: Sat Sep 23, 2006 00:27 
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mpaton2004 wrote:
Interesting, I wonder what the CO2 output of say, a Honda CBR600 would be compared to cars

Would that be comparing it to a Nissan Micra or a gas guzzling V8?

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(I'd expect it to be very high when they are being ridden hard)

By the same token, it will also be high in a car when it is having the bollocks revved out of it.

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PostPosted: Sat Sep 23, 2006 17:59 
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I would have thought most performance machines would have similar outputs to high performance cars. If you consider say, a Subaru Impreza at 6,000 rpm and an R6 at 13,000 rpm - I bet they're similar.


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 Post subject:
PostPosted: Sun Sep 24, 2006 10:22 
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all modern bikes meet and some surpass the current (Euro 3??) emissions standards.
Bikes were never tested previously because their Co output was nothing to be concerned about.

I wonder why the Co output is measured at idle?? maybe because the amount of time engines are emitting Co is more of a concern than actual output. we all know most bikes don't sit around in lines of tailbacks. The fuel used to accelerate most cars is greater than is used for a bike even if MPG may be similar.


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PostPosted: Sun Sep 24, 2006 19:56 
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The amount of carbon produced is directly proportion to fuel consumption (since that is where it comes from in the first place)

My wife a 125 and my daughter a 50cc scooter. Both do more than 100mpg. It is therefore logical to assume it has the same C02 emmissions as a 100mpg car. I would like to know what petrol car has that kind of fuel consumption.... :wink:

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 Post subject:
PostPosted: Mon Sep 25, 2006 12:31 
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What about the ones who ride 600+cc sportsbikes which do in the low 20's to a gallon?


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 Post subject:
PostPosted: Mon Sep 25, 2006 12:46 
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Assuming a bike does about 45-55mpg (real mpg) and approx. 4,000 miles year we get 0.5 tonnes of C02 per year

I used this as the basis of my calculation.:
http://www.greenfleet.com.au/transport/technical.asp

or put simply the avg bike puts out the weight + rider every year.

When I did a recent track day on a track prep'd CBR600rr I got about 27-30mpg and 1 pair of tyres in a weekend. Driven at 60mph in top - that same bike would probably do 60 mpg.

Last time I did a track day in a car was a TVR 4.0 chimp and managed about 16-18mpg and lunched a pair of rear tyres (with 2k on) in a day.

I once got 30-32mpg at a steady 50-60mph out of that same car.


Last edited by diy on Mon Sep 25, 2006 12:53, edited 1 time in total.

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 Post subject:
PostPosted: Mon Sep 25, 2006 12:48 
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I'd like to know of any bike that does crap MPG like that. Among my bikes I have a 1952 BSA, 1968 Triton and a 1971 500 Triumph. NONE of them does less than 50mpg including the 750. A mates 1000cc BMW does around 40-50mpg and he still has the exuberance of youth to drink more fuel.


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 Post subject:
PostPosted: Mon Sep 25, 2006 12:54 
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Presumably official fuel consumption statistics for bikes are not produced either.

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 Post subject:
PostPosted: Mon Sep 25, 2006 13:01 
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the early honda firestorm 1000 v-twin was a gas guzler with a small tank did about 90 to a tank on a track day 110 on the road. Even if that was using every last drop in the tank - you've still got 26mpg.

This is why bikes have to be effiecient - few bikes cary more than 20 litres and most sports bikes have 16 litre tanks.

nobody wants bike that they have to refuel every 100 miles. Particularly if you're out with sports toures that can get 170+ per tank


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 Post subject:
PostPosted: Mon Sep 25, 2006 14:03 
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mpaton2004 wrote:
What about the ones who ride 600+cc sportsbikes which do in the low 20's to a gallon?

Where did you get that impression from?

I can get 150 miles from £15 worth of petrol out of my 30 year old Kawasaki Z1, dropping to around 130 miles if I start using the gas.

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 Post subject:
PostPosted: Tue Sep 26, 2006 13:07 
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Ditto. Honda CBR600, currently averaging 56mpg. Costs £12ish to fill the tank and runs onto reserve sometime between 150 and 165 miles.

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 Post subject:
PostPosted: Tue Sep 26, 2006 19:31 
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Last edited by FJSRiDER on Wed Oct 04, 2006 15:16, edited 1 time in total.

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 Post subject:
PostPosted: Wed Sep 27, 2006 00:33 
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I get about 110 miles from full to the warning light coming on, and thats about 12 quids worth of unleaded.

Thats the price of two honking great throttle bodies doing their best to turn the tank inside out :D

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 Post subject: Gas guzzler ?
PostPosted: Wed Sep 27, 2006 20:08 
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My 1100cc does over 50mpg.....but it also has a cat on, so does it matter ?


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 Post subject: Re: Gas guzzler ?
PostPosted: Thu Sep 28, 2006 09:19 
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jomukuk wrote:
My 1100cc does over 50mpg.....but it also has a cat on, so does it matter ?


Cats increase C02 but reduce Carbon Monoxide.

From memory Sweden is the only country that requires a cat for motorcycles but some manufacturers fit them as standard to have a common spec.

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 Post subject:
PostPosted: Thu Sep 28, 2006 22:35 
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I have a hyena on mine..

But seriously, I think California has really strict emissions standards. Do they fit cats to bikes over there?

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 Post subject:
PostPosted: Fri Sep 29, 2006 08:09 
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Badgerman wrote:
I have a hyena on mine..

But seriously, I think California has really strict emissions standards. Do they fit cats to bikes over there?


I believe so. They also have other emissions control equipment fitted to the bikes

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