Hello, I recently picked up a used 2015 Icon with the Termignoni exhaust. It runs great and is in perfect condition but when I ride it, it'll backfire a bit when downshifting and slowing down. It doesn't kill the engine but it is still more than I have seen/heard from other bikes. Anyone else have the Termi exhaust and seen anything similar?
Termignoni exhaust with backfire
1 - 20 of 21 Posts
Joined
·
3,094 Posts
"They all do that sir"
Well, as long as you have the air injection system working, it will always do so. Even on a stock exhaust. And it got louder the moment that Termi exhaust was installed, just because your exhaust is louder.
I don't think it's backfiring (that's firing back into the airbox, and can lead to serious airbox damage), it's most likely decell popping.
Well, as long as you have the air injection system working, it will always do so. Even on a stock exhaust. And it got louder the moment that Termi exhaust was installed, just because your exhaust is louder.
I don't think it's backfiring (that's firing back into the airbox, and can lead to serious airbox damage), it's most likely decell popping.
Joined
·
1,671 Posts
Mine's the same Max. Seems worse after the 600m service. What is it and why is it so extreme on our Scramblers?
Are there any sort of mods to the ECU to help with that? I have heard that putting on a different exhaust system should be done with updating the ECU to help reduce decel popping and to prevent the bike from running lean.
Is that something that is usually done when the exhaust is installed? I bought this bike used with the Termi on it so I don't know what else, if anything was done to the engine.
It does say that when the key is first turned on. And that is the only reason that RACE will show on the screen?
Cool, and theres no harm to the bike or exhaust when it pops?
Joined
·
3,094 Posts
Nope, the air injection system is actually a good thing. It allows the engine to run a tad richer and still keep the exhaust gasses lean enough for the catalytic converter to work within it's operating range.
If you just simply disable it without taking measures in the cpu/fuel injection mapping (!!), the return information from the lambada sensors will make the EFI lean off the fueling until the lambda value is within range...
If you just simply disable it without taking measures in the cpu/fuel injection mapping (!!), the return information from the lambada sensors will make the EFI lean off the fueling until the lambda value is within range...
Awesome, I talked to the dealer I got it from and they said they would remap it and take a look to make sure they didn't miss anything so if it still pops, I wont worry about it again. Thanks for your help!
Not if you just plug the AIS hoses though? The ECU won't know - or are you saying the lambda sensors will tell it? I always assumed this and the only concern would be destroying the cat...which i dont have. Ready to stand corrected.
Sent from my SM-G900I using Tapatalk
Joined
·
764 Posts
No catalytic convertor with the Termi but I think the Lambdas are still active.
Joined
·
3,094 Posts
Well, the AIS is part of the closed loop, so yes I’d expect the ecu to lean off the fueling if you just plug the AIS.
Joined
·
1,671 Posts
I had the racing termi. fitted from new which involved removing the CAT. The system was re-mapped. Do I need to be concerned about anything?
Sounds legit. Glad I never disabled it then. I have the full Termi and the popping is not bad. Only considered doing it because I removed it on my Triumph Scrambler. That had carbs tho.
Sent from my SM-G900I using Tapatalk
1 - 20 of 21 Posts
Join the discussion
Join now to ask and comment!