Motorcycle emissions

[Kickstart]

Hi

Found this while looking for something for another thread. Caould not find the old DETR stats I was looking for, but this might worry a few people:-

https://www.aeat.co.uk/netcen/airqual/naei/annreport/annrep99/app1_29.html

(a slightly prettier old copy is at https://www.aeat.co.uk/netcen/airqual/naei/annreport/annrep98/app1_29.html).

It lists various emissons. Comparing a few groups:-

Carbon monoxide emissions:-
Petrol Car, urban use, pre ECE rules, 26.92g/km
Petrol Car, urban use, Euro 2 compliant, 1.26g/km
Buses old, urban use, 18.8g/km
Buses, urban use, Euro 2 compliant, 3.02g/km
Motorcycles <50cc, urban use, 23.81g/km
Motorcycles >50cc 2 stroke, urban use, 23.37g/km
Motorcycles >50cc 4 stroke, urban use, 20.81g/km

Benzine emissions:-
Petrol Car, urban use, pre ECE rules, 157mg/km
Petrol Car, urban use, Euro 2 compliant, 5.38mg/km
Buses old, urban use, 4.06mg/km
Buses, urban use, Euro 2 compliant, 1.25mg/km
Motorcycles <50cc, urban use, 840g/km
Motorcycles >50cc 2 stroke, urban use, 650g/km
Motorcycles >50cc 4 stroke, urban use, 125g/km

Just goes to show how easy it is to shoot down any claim that motorcycles are more environmentally friendly.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[RaIo]

[Kickstart]

[JonB]

Oh well, bikes are more fun.
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Be careful whose advice you buy, but, be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than it?s worth.

[NickD]

One mediating factor for the case of bikes, that I suspect the above figures don't take into account, is that journeys are often completed in less time (not taking speeding into account ). So while a car is still sat in traffic, belching filth into the atmosphere, the bike is already at it's destination with the engine off.
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I was only doing what it said on my licence officer....
Tear along the dotted line!

[tatters]

The EU can take my stink wheel when they prize it from my cold dieing hands
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Past:NRG50,AF1125(x2),NSR125RR,ZZR250,CX500,VFR400,KR1S,ZZR600(x2),CB400N,YZF1000(x2),KH125,Z200,FX400R,CBR954RR(x2)GPZ500S,GT550,VFR750F(x2),RD350N,XR650R,CBR600F,CB250,KDX250,YZF750R,CRM250,400EXC,KLR650,TTR600RE,DR350S,R100GSPD,RGV250,VMAX1200,DL650,KZ750 Present:G650XC,C12,CRF450X,1190ADV

[stinkwheel]

Depends on what you are talking about with regard to 'pollution'.

The figures are for carbon monoxide which is converted to carbon dioxide in a catalytic converter, obviously the cars are going to put out less because most bikes don't have a cat.

I thought the big problem we were supposed to be concerned with was volume of carbon dioxide emissions, in this respect I would still suggest that bikes have a lower output per unit journey than cars.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Kickstart]

[JonB]

Would the engine size have any great impact on emissions? I.e as you get a bigger engine the emission is larger?
____________________
Be careful whose advice you buy, but, be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than it?s worth.

[Flip]

TBH I'm not bothered about emissions and the whole green thing, I'd stuff starving African children into my tank if the bike required it. Even if the bike spat blood out the exhaust.

[Kickstart]

[mr.z]

Is that factoring in the emissions produced in manufacture, maintainance and disassembly? not to mention energy required...

The same statistics presented differently or omitting this sort of information, can be twisted to whatever point of view required.

Appart from scooters... runing on (fossil fuel) oil is never going to do the environment allot of good...

Makes interesting reading though.

Right, i'm of to kill a hippy.
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>RidingSkills<->Tech Tips<->MyBikes<

[Keith]

Well I knew 2 smokes are more pollutive than 4, but I didnt realise they were that much more.

When out walking the dog or something during tea time traffic, I'll always think "Look at all those cars, all of which are contributing to global warming," but in effect, my RS125 pollutes far more than several modern cars put together.

I'm one of those people who do think what sort of damage we are doing to our world, but it goes far deeper than just transportation so its not much to worry about.

Good post Keith, interesting read.
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Aprilia RSV Mille R Edwards Replica - Aprilia RS250 - Suzuki GSXR600 Supersport Race Bike

[stinkwheel]

[Kickstart]

[stinkwheel]

[cagiva gezzer]

A few things i've found.

The table shows stinkwheels point about cats not working too well after a bit of use in a stroker. (THC = total hydrocarbons, VOCs = volatile organic compounds)

It also shows how bad engines get with use. Ok, the study was carried out in Taiwan, so they might not have the best maintained engines in the world.

The other pdf's might be of interest if you're wondering what the future is after internal combustion engines.

I'll have a root around for some other pdf's that compare bikes to cars to "the rest."
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"because one stroke isnt enough and four strokes waste two"