no..they don't.
ever hear of a little property called 'the dopler effect"?...at speed your actualy ahead of your sound by feet (or meters) based on speed of course. You end up a hood (bonnet) decoration before your heard.

those kind of pipes are to boost as much power as possible and to hell with what people think.

__________________
kicka,kicka,cough, sputter, kicka,kicka, cough, sputter, bwbwbwbwbw....she running fiine today

Read back on my posts, I am not explaining my reasons again.

also, when you skim past a car with those pipes you can shock the driver, causing them to swerve. loud pipes has absolutely nothing to do with safety

Lets dispel the stupid (mindless) MYTH that loud exhausts save lives! It's complete twaddle - NONSENSE!

I believe the person who has it about right is EvilNerdLord above.

These loud (unlawful) exhausts are, above all designed to increase power and TO HELL WITH ANYONE WHO DOESN'T LIKE IT.

These things are becoming the bane of many people's lives and the law needs to be changed to STOP their import. I would go further and make it a criminal matter giving the police powers to seize the vehicle and crush it (sect 165 RTA).

Our roads are NOT properly policed the way they used to be, that's a fact. What we need is more plain cars and REAL Traffic Coppers who love busting the BAD guys (not criminalizing law abiding Joe Public). What we have in place at the moment is a bunch of self-serving police chiefs appointed by their political masters to recover as much revenue as possible from the law abiding people they are supposed to be serving.

Police officers now often have great difficulty working out what constitutes a real criminal offence (one where there is an injured party). Many of our laws have been designed by our political masters to seize revenue from easy touches out there (law abiding citizens are the only people who pay up easily/instantly).

I don't doubt there are very good Coppers (thief takers) still out there, but from what I can see they are getting pretty thin on the ground. Sadly they are slowly being replaced with robotic revenue collectors who have no problem criminalizing innocent hapless motorists.

It's all about TEACHING US WHOSE BOSS!

__________________
Triumph Bonneville 800 (2004), Yamaha XT600E (1999), Honda XBR500 (1986).

Well the good news is that our political masters in Europe were legislating to prevent the modification of motorcycles using any non-homologated part. MAG and its European counterparts were fighting hard against this but but it's all gone a bit quiet on the news front recently.

I doubt it would make much difference though, I used to live in France where it is already illegal to supply non-homologated parts and the 'peds are still noisy as hell. It's a fact of life that 50cc CVT mopeds and scooters make a particularly annoying noise.

__________________

my apologizes, pipes are a emotionally hot topic around where I live...

__________________
kicka,kicka,cough, sputter, kicka,kicka, cough, sputter, bwbwbwbwbw....she running fiine today

I use engine noise when appropriate too! when I leave my house before 07:00 on a Sunday to do out for some fun I am really quiet! very gentle with revs and throttle, on the way back if I think my daughter is out playing or the neighbours kids I hold the gears so they can hear my noisy engine before they see me come round the corner (slowly). This way they are off the road instead of on it! Even at 15 or 20 mph.

when they don't hear me, they have run out in front on 2 occasions now.

Loud pipes are fine provided you are very gentle in residential areas especially during unsociable hours!

Whaaaaaaaaahayyyyyyyyyyyy
This topic is up and running again Best dont go thrashing the tits off your AP50 with a loud spanny attached in the Kent area or someone is likely to have an apoplexy

It's nothing to JOKE ABOUT. It upsets this Swampie that much he's got CAPITAL LETTERS and he's PREPARED to USE them.

Have you read all the previous posts - apparently trial by combat is going to be resurrected Still beats a "caution" by miles !!

To be ahead of the sound your engine is making you would have to be travelling faster than the speed of sound; ie Mach 1, or 766mph (approx. 340meters per second depending on air pressure).

The doppler offect is not really this its a change in pitch of the sound (or light) wave, either up or down depending on direction of travel.

I have nearly been wiped out by an electric car coming round a blind bend.... couldn't hear it over the cows in the next field.....

they are bloody dangerous those electric cars.

...maybe?

I was a at Suzuki dealer a couple of days ago getting oil and filter and they were closing shop and moving the bikes in. As I was leaving a sales person moved an electic bike in from the display corso out front and what an amazing thing 'not to see'. It moved so quick it was a blur over a 50 yard dash to the inside of the store - such a blur that I could tell it was a bike, could not tell what brand and vaguely got the color of the jacket the guy was wearing. It was silent and deadly fast.

So whats the answer for these things as far as louder exhausts go?; as they cannot be heard by others on the road or pedestrians crossing it. Perhaps a CD recording of a loud engine playing from an amplifier mounted on front and flashing lights perhaps as a backup 'cause you cant hear them.:confused1: