popping and banging on over run...

I see alot of people with after market exhausts say their bikes pop and bang like mad... ive just bought a speed triple and ive not once heard any banging and popping from the exhaust... each to their own but i quite like it when they pop and burble on over run.. any ideas why this one dosent?

 

You don't give much info about your bike so it's difficult to say, but my guess would be that a previous owner removed the AI system - which is the usual cause for noise on over-run.

 

As big lad said.
Popping can be achieved if you've a loose header or a minute rust pinhole on old exhausts coming near from the start of the down pipes.

 

ive just checked the AI system its all in tack, no blank plates, solenoid still plugged in etc, i unplugged the solenoid and tried it, it pops and bangs like a good'un, but obv no good as it makes the engine management light come on.

bike is a 2005 model, has an aftermarket single 3-1 can and pipercross filter

 

Look at tuneecu download for your model, if there, and you have the ability to "turn off" AI which will sort your eml. You're not reloading your map just unticking a box.

 

mines sounds like WW2

 

That's because if you unplug the solenoid, the AI is fully open, permanently!

The solenoid works by voltage from the ECU closing (rather than opening) it, when not required - which is a large portion of riding conditions.

 

will it have any bad effects having the solenoid permanently open?

 

Well it's not designed to work that way so there's a danger it will overheat the headers and it might affect the fuelling trims managed by the O² sensors.

Basically it's not good.

 

what have you done for it to be like that?
mile dosent make even the slightest pop with the sai plugged in

 

I've just collected a 2015 1,725m Speed Triple R with the Arrow high cans & the bike pops & gargles on over run all the time - I assume this is normal with Arrow cans?

 

Welcome Dickie.
Yep, perfectly normal. Most like it (me included), a few find it irritating.
Likely yours has been dealer fitted, but might be worth just checking with your dealer that the map has been changed to suit.

 

Thanks Col, I'll do that.
I was intending to email them anyway - the bike has come with two Triumph Diagnostic Tool - Autoscan Reports, one at 1 mile & one at 426 miles, & both say 'Fail' Throttles unbalanced - to ask if they were balanced after the report.

 

The burbling/popping is caused by SAI (secondary air injection), which I believe is there to remove unburnt fuel in the exhaust gases. If the sound annoys it can be stopped by disabling the SAI valve (and blocking the hose).

 

I fancy a Speed Triple but not the pop & bang, do they do it in standard trim?

 

I fancy a Speed Triple but not the pop & bang, do they do it in standard trim?

 

Yes it’s the SAI system injecting air into the exhaust to burn any unburnt fuel before it gets to the cat.
It can be disabled with Tunecu and blanking the SAI valves on top of the cylinder head, no more poppy bangy