Safe Speed Forums

Is there a list of CO2 emissions from motorcycles anywhere? Ideally over the last 10 years.

I doubt it. No need for the information. Bike homologation does not require manufacturers to measure Co2.

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Speed camera policy Kills

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)

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


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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What makes you think I'm drunk officer, have I got a fat bird with me?

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.

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.

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....

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Speed camera policy Kills

What about the ones who ride 600+cc sportsbikes which do in the low 20's to a gallon?

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.

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.

Presumably official fuel consumption statistics for bikes are not produced either.

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"Show me someone who says that they have never exceeded a speed limit, and I'll show you a liar, or a menace." (Austin Williams - Director, Transport Research Group)

Any views expressed in this post are personal opinions and may not represent the views of Safe Speed

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

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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What makes you think I'm drunk officer, have I got a fat bird with me?

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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Fatshoutybloke

..

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Q. Are you a stupid fascist with limited reading skills or are you just a retard?

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

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"Are you sh**ing me?"
"John Spartan, you are fined one credit for a violation of the verbal morality statute."

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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Speed camera policy Kills

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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The light at the end of the tunnel is the light of an oncoming train..

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

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"Are you sh**ing me?"
"John Spartan, you are fined one credit for a violation of the verbal morality statute."