Exhaust popping on deceleration

[colesyboy]

Hi all,
I swapped out OEM exhaust and cat for an aftermarket exhaust (dominator) on my r1150rt 2004.

Pops like buggery when decelerating, I found a thread where removing the motronic relay helped, and it did, but still pops.

So apart from that is there anything else I might do to stop the fat old lady from farting excessively?

Thanks for any suggestions !!

Cheers
Brian

 

[Wrigsby1]

Air getting in or just the fact that the cat and silencer do a lot of silencing...

And/or it's running a bit weaker/rougher with the open system on....? Did it keep the lambda?

Perhaps fat old ladies were meant to be quiet...

 

[Mzokk]

Every r1150 or 1100 that I've encountered pops and bangs on the overrun with the cat removed and/or an absorption tube type silencer....Remus and the like.

 

[Paul Young]

Unburnt fuel into a hot exhaust, with somewhere that oxygen is also getting in = combustion in the exhaust. It’s down to a couple of things; fuelling map at that throttle opening and ECU setting, and an air leak somewhere that allows it to suck in air on the overrun. Mine does it just when I crack the throttle after engine braking and apparently can look quite impressive from behind at night… I admit that it feels a bit antisocial sometimes and I’d rather it didn’t do it, but the trade off is worth it for me.

 

[colesyboy]

Air getting in or just the fact that the cat and silencer do a lot of silencing...

And/or it's running a bit weaker/rougher with the open system on....? Did it keep the lambda?

Perhaps fat old ladies were meant to be quiet...

I’m sure it’s weaker and rougher with the new exhaust / no cat setup - lambda not kept - she just sounds dicey, burping and farting so much these days, signs of incontinance!

 

[colesyboy]

I’m sure it’s weaker and rougher with the new exhaust / no cat setup - lambda not kept - she just sounds dicey, burping and farting so much these days, signs of incontinance!

I saw steptoes replacement motronic setup - might give that a go

 

[Daffy]

it’s air getting in, if it didn’t do it before check the joint to the headers, silicone sealant can help.

 

[KMD]

I’ve had 3 1150’s and every one of them has popped on the overrun, especially with after market exhaust components.

 

[Steve B]

I’ve had 3 1150’s and every one of them has popped on the overrun, especially with after market exhaust components.

Is this also applicable with a stubby fitted?

 

[oblertone]

Is this also applicable with a stubby fitted?

No

 

[Coppertop]

I'd just enjoy it, gotta love when these big twins pop and burble on the overrun. lovely stuff.