Numbers really can reflect anything you like. 20% of all statisticians know that!
Numbers really can reflect anything you like. 20% of all statisticians know that!
Exert your talents, and distinguish yourself, and don't think of retiring from the world, until the world will be sorry that you retire. -Samuel Johnson
Little bit wrong:
Bikes generally don't burn fuel more efficiently, but do burn it more often to make more power per cc than a normal ,everyday car. And because they have operate over a larger rev range, combustion chamber design is hard to optimise. And when it is, it is often optimised for maximum power, at the top end of the rev range, meaning less efficient combustion at lower speeds (where there is a lot more time spent).
Getting back to OP's point, I think the major reason why there is more pollution from bikes (NOx, unburnt hydrocarbons, CO, particulates etc) is that car engines have been designed for low emissions for over 20 years, whereas bikes have only needed to meet emissions targets within the past 5 years or so - emissions controls for cars are that far ahead that such a comparison is not unexpected.
Honda had an advertising campaign about 10 years ago in which they claimed one of their motors, with the appropriate lean-burn, emission controls installed would (ignoring the C02 and H20 content of the exhaust) exhaust cleaner air than that present in major cities in the US - it would actually clean up pollutants in the atmosphere.
Cheers,
FM
C
Regardless of the fuel emissions argument, the most energy & pollution in a vehicles lifetime is caused during manufacturing and disposal. Cars are far higher than motorcycles in this respect.
Originally Posted by Kickha
Originally Posted by Akzle
When you buy a big bike, you should get a small low emissions going to work on bike FREE! Bullshit made up problem solved! Sounds like a load of arse. Some dick just wants more research money and some other dick is giving it to them. There is no way in hell my bike puts out more crap than my sisters monster truck, even if I do four times the mileage she does.
I estimate in 10 years there will be NOTHING fun at all to do ever. This is because greenies think fun = bad.
Just a few things I'd like to throw in...
It says they tested 50cc scooters and motorcycles over 800cc...
I've never ridden a big bike but I've heard they can use just as much fuel (distance per litre) as a car depending on your riding style.
Some bikes as late as 2007 are still using carburettors.
But that still doesn't add up to bikes being 16x more pollutant than cars.... that's the biggest crock of shit I've ever heard.
Most bikes are sports tuned vehicles (especially in the 800cc+ classes), It's not fair to compare them to all the cars on the road the majority of which these days being small passenger cars.
That is NOT a paper, it is a report on a paper. There is a huge difference. But without the actual paper with its methodology and datasets it is difficult to make any scientific comment.
One thing we can comment on though is a simple matter of logic: Each litre of fuel has the same chemical composition, and whether it is burnt in a car or a bike engine it will put out a similar level of exhaust emmisions. The exact composition of these emmisions will vary depending of the burn efficiency, catalytic convertor effectiveness etc. However the only true measure of pollutants is the amount of fuel burnt per distance travelled. Please advise me of the car type that gets 16 times the fuel mileage that my 1000cc bike gets.
Time to ride
The whole Green House thing is BS.
See
The problem with fact's is you have to actually spend some time reading them - and think about it a bit to make your own mind up.
I Looked at the link you posted and started reading - then thought I could'nt be bothered reading all that - just give me the punch line (summery).
That's why 'global warming' is being accepted - because they tell us, we don't have to read anything or think about it for our selves. Much easier
Lifes Just one big ride - buckle up or hang on
Rocket III is EURO III compliant,
If everyone had Euro III compliant vehicles then NZ would be a better place.![]()
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