Bike idling high after backfires!

A

ashley30

Joined Aug 2016
12 Posts | 6+
SINGAPORE
Hi, really need you guys to help!
The bike was running well. Regular maintenance and oil change. Recently reset the Oil Change light. Ride the bike around for 5km then suddenly it backfires. It's not the first time the bike backfires. Occasionally and I don't feel it's much of a problem as it still runs normally. But this time after the bike backfires, the idling immediately runs high around 3200rpm!
There's no error lights or whatsoever.
Brought the bike back to dealer, there's no error light or warning lights. Reset all sensors, throttle position seems ok, ( 0-100% tested ). Decided that I uninstall the Termignoni UP-Map and it still runs the same. The idling remains high. Checked everything and dealer too seems puzzle as there's no indication or error lights. What should I do?:confused::confused::confused:
 
Antihero had the same issue but hasn't responded on how the dealer fixed the issue.
 
Backfire bent the throttle butterfly maybe? Only way to increase rpm on a petrol engine is to increase the air mass somehow...
 
I have a 2015 1299. After I installed an Arrow cat eliminator exhaust, it backfires on every shift. No damage to the motorcycle and I like th sound. I recommend turning off everything electronic (i.e. ABS, EBC, DTC, DWC) and see if you still have the problem. If it goes away, you can start turning electronics on , one by one, until the problem starts again. You could also reset to default darwttings using the controls panel.
 
Stephen6 said:
I have a 2015 1299. After I installed an Arrow cat eliminator exhaust, it backfires on every shift. No damage to the motorcycle and I like th sound. I recommend turning off everything electronic (i.e. ABS, EBC, DTC, DWC) and see if you still have the problem. If it goes away, you can start turning electronics on , one by one, until the problem starts again. You could also reset to default darwttings using the controls panel.
Click to expand...

Good Idea. Will try this method when I go to the dealer later today.

Phl said:
Throttle body reset could help as well
Click to expand...

Had already tried all the reset. Throttle body, throttle, idling, but still runs at 4rpm at idle. No error code or anything.

Trackjunkie01 said:
How many miles on the bike? I recently had a similar issue. May want to check the plugs. Mine were fuel fouled. ...
Click to expand...

Had just recently changed the plugs. Not even 800 miles. Had taken out the plugs and it looks fine.

TurboLag said:
Backfire bent the throttle butterfly maybe? Only way to increase rpm on a petrol engine is to increase the air mass somehow...
Click to expand...

Opened up and checked. The butterfly seems fine. Really lost for ideas.
 
As said above this is what antihero had, the dealer found what was the problem was.
 
Latest update.
I found the problem.
Too much backfires is not good for your bike.
Because of the back fire, the rubber manifold broke/exploded.
Even the lower airbox rubber cover broke too.
Therefore the vacuum air was not proper.
And never use MWR air filter for normal road use either.
It's not suitable. Too hollow and too much dirt comes through.
Changed K&N since and parts for the manifold and airbox lower cover
bought off eBay.
Just so you guys know. Too much backfires might break these rubber manifolds.
 
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I can understand the manifold rubbers from your picture above but what is the lower airbox rubber?

I would say this is what caused the backfire in the first place.
 
TurboLag said:
I've been using the Sprint P08 since my first service after the break in period without issues. It's the same as OEM for the Panigale R :)
Click to expand...

I'm staying with this as it's the stock one on my bikes. The others just don't filter enough and the extra hp gains isn't worth the premature wear on valves and cylinder walls etc.
 
I guess I should clarify. My 1299 has exhaust backfire.

I guess I should clarify. My 1299 has exhaust backfire (unburned gas in the exhaust ignites during a shift). And of course that doesn't hurt anything. But an intake backfire is indeed a serious problem. Thanks for the heads up on MWR filters.
 
Halo2 said:
I can understand the manifold rubbers from your picture above but what is the lower airbox rubber?

I would say this is what caused the backfire in the first place.
Click to expand...

The lower air box rubber is to close your chasis ( which also acts as the air box ) and seal the vacuum air. The manifold kind of burst, ripped in half, thus pushing the lower cover airbox upwards and ripped it a bit. Will show you the product once the mech give it to me.
 
This was taken on the 4th September at the Sepang International Circuit.
It was a trackday. Bike had a full carbon fairing. Changed the rims to "S" model.
Used a SC Project exhaust and sounded like a MotoGP.
Overall performance was ok. It was back from the trackday then it had problems.
IMG_6197_1_.JPG

21231660_898014240347434_5388274346957105691_n.jpg
 
Is it possible to do a visible inspection on the lower manifold rubber gasket without having to remove the frame?

Also, do you happen to have a part number?

My bike is having issues with idling, so I changed both map sensors and spark plugs and still the bike will idle fine for 30 secs then start to stumble and die. The issue only occurs when idling, anything above 3k rpm the bike runs great. I sent the bike to the shop any they couldn't find any issues when plugged into their DDS system. I am stumped.
 
Last edited:
Is it due for valve clearances?

I was trying to find out the same thing and now the picture is gone
(this was about popping exhaust)

there is a lower airbox gasket 78811161A
intake manifold is 14010691A

Not sure which one was replaced, does look like the frame is removed.
 
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