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Old 05-13-2012, 07:45 AM   #1
cyberone28
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Question bike popping on deceleration

I noticed my bike today when I was decelerating ( engine braking) it started to make some popping sound. Like popopopopopo pa!! ..
I think I put to much oil? And its going to sparks plugs? Only used 3 qrt of synthetic oil.
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Old 05-13-2012, 07:51 AM   #2
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It's lean.
Too much oil won't do that. Have you changed anything like exhaust or air filter lately?
How old is your bike? Could be an intake boot has cracked and letting it suck air. Or a vacuum line.
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Old 05-13-2012, 07:55 AM   #3
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Quote:
Originally Posted by cyberone28 View Post
I noticed my bike today when I was decelerating ( engine braking) it started to make some popping sound. Like popopopopopo pa!! ..
I think I put to much oil? And its going to sparks plugs? Only used 3 qrt of synthetic oil.
Did you actually check the level of oil?

What else have you done to the bike? replaced anything related to ignition? do you have a PC or something similar?

Most of the time when closing the throttle right after high rpms and the exhaust pops that an indication of unburned fuel that got past the piston chambers, gets in contact with the very hot exhaust and ignites, many bike, including mine do it because of a different tune/map (mine has a race ECM) and is quite normal.

But others may do it because of an ignition problem or another issue where fuel doesn't get burned completely.
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Old 05-13-2012, 07:57 AM   #4
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Yes I change the old air filter with the k&n air filter also new spark plugs ..
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Old 05-13-2012, 07:59 AM   #5
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No power commander.. only changed air filter spark plugs oil and filter. I think oil is a little to high ons drain a little
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Old 05-13-2012, 08:03 AM   #6
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Quote:
Originally Posted by cyberone28 View Post
Yes I change the old air filter with the k&n air filter also new spark plugs ..
Did it pop before the K&N?
It's not the plugs or the oil.

The mixture has gone lean, most likely from the filter swap (I'm betting your bike has aftermarket exhaust too or at least a can).
If it's bad enough you need to either go back in the stock direction or get a power commander.

Like I mentioned, it also could be caused by cracked intake boots or vacuum lines.
How old is your bike?
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Old 05-13-2012, 08:08 AM   #7
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No before the k&n it run without popping but less power I cam feel the difference and yes you are right it has a yoshimura slip on exhaust.

Bike is 2005 11k miles yamaha r6
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Old 05-13-2012, 08:09 AM   #8
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Quote:
Originally Posted by cyberone28 View Post
I noticed my bike today when I was decelerating ( engine braking) it started to make some popping sound. Like popopopopopo pa!! ..
I think I put to much oil? And its going to sparks plugs? Only used 3 qrt of synthetic oil.
What kinda bike is this? I just pluged the pair valve on my ninja, after installing my new arrow exhaust I had popping on deceleration. after plugging my pair valve its gone away. this is on a Fi bike though.
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Old 05-13-2012, 08:15 AM   #9
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Quote:
Originally Posted by sullivan View Post
What kinda bike is this? I just pluged the pair valve on my ninja, after installing my new arrow exhaust I had popping on deceleration. after plugging my pair valve its gone away. this is on a Fi bike though.



Yamaha r6 2005 11k miles
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Old 05-13-2012, 08:22 AM   #10
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Well, I'm guessing you either need to go back toward stock, as in, stock air filter or stock exhaust, OR get a PC AND inspect your vacuum lines and intake boots.
The lean condition has to fixed or it will continue to pop on decel.

You have to decide if it's bad enough.
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Old 05-13-2012, 08:26 AM   #11
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It don't bother me but this lean is good or bad?
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Old 05-13-2012, 08:28 AM   #12
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Quote:
Originally Posted by cyberone28 View Post
Yamaha r6 2005 11k miles
"AIS takes clean air from the air box where it is distributed and pulled (under vacuum) past the reed valves and in to the exhaust port where it mixes with the unburned fuel and ignites @ 1200 degrees it in the exhaust header. "

"If you get allot of deceleration popping with a slip on or full system this removed will help reduce it. The AIS helps the bike put out "cleaner" emisions. Thats why a "racer" would have no need for it and if you get a after market pipe some choose to remove it."

My ninja has a crank case breather, so make sure you do as well.

From the R6 forum; How-to: completely remove AIS
http://www.r6messagenet.com/forums/r...emove-ais.html

They sell block off plates as well for this kind of thing, http://www.tobefast.com/circuit1-r1-...-10001410.html

If you completely remove it you may need to add a resistor on the pair valve power, this makes the Fi light turn off if you get an error after removing the system.
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Last edited by sullivan; 05-13-2012 at 08:32 AM.
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Old 05-13-2012, 08:33 AM   #13
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Quote:
Originally Posted by cyberone28 View Post
It don't bother me but this lean is good or bad?
Excessively lean mixture can cause a valve or a piston to melt in extreme cases.

I'm NOT saying is running lean, most time they pop when they run rich, but what I would do is recheck the spark plugs for proper gap, then replace the air filter with the stock one.

Process of elimination.

If you wanna go to K n N filter and all that stuff, I suggest you to get a PC or similar product.
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Old 05-13-2012, 08:39 AM   #14
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If I was you, id pull the baffles/snorkels from the airbox if possible while your in there. Its made my bike have a nice throttle sound now.
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Old 05-13-2012, 08:42 AM   #15
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Yeah I like the power it has now, so I will get a pc
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Old 05-13-2012, 08:46 AM   #16
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If you changed the oil and added 3 qts, i can't see the need to drain some. Is there not a sight glass on the side to see the oil level?
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Old 05-13-2012, 08:57 AM   #17
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Quote:
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If you changed the oil and added 3 qts, i can't see the need to drain some. Is there not a sight glass on the side to see the oil level?
i looked for that glass and could not find it the lever that goes to the engine shows that is high on oil... i thou r6 holds 3.5 qrtz of oil..
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Old 05-13-2012, 09:05 AM   #18
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Without filter replacement 2.54 qts With a new oil filter 2.75 qts. The dip stick is on the right side its about 3 inches long. unscrew it check oil

http://www.r6messagenet.com/forums/r...yamaha-r6.html

^^^ That is a step by step guide, 2.8 quarts is stated to use. If this was an oil issue I think you would have other problems. Just make sure you got at least 2.8 in there and not much more
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Old 05-13-2012, 09:47 AM   #19
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Quote:
Originally Posted by sullivan View Post
Without filter replacement 2.54 qts With a new oil filter 2.75 qts. The dip stick is on the right side its about 3 inches long. unscrew it check oil

http://www.r6messagenet.com/forums/r...yamaha-r6.html

^^^ That is a step by step guide, 2.8 quarts is stated to use. If this was an oil issue I think you would have other problems. Just make sure you got at least 2.8 in there and not much more
will check the oil im positive thats the reason im goin to open all up again to see if spark plugs have any oil residue same on the air filter box.. the deep shows oil measure aboe the high measurement.
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Old 05-13-2012, 10:32 AM   #20
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Quote:
Originally Posted by cyberone28 View Post
will check the oil im positive thats the reason im goin to open all up again to see if spark plugs have any oil residue same on the air filter box.. the deep shows oil measure aboe the high measurement.
There is no chance in that overfilled oil caused popping on deceleration. It is and I ****gaurantee**** fuel related.

I bought a ZX10-R one time that had over 7 qrts of oil in it (ask Patrick at Motorcycles Unlimited, he changed it)

For someone who doesn't even know how to properly check and change oil, I would refrain from being "positive" about anything that you know about the bike.

Also you should call Motorcycles Unlimited and find out when their next free motorcycle maintenance class is. You desperately need it before you fubar that bike.
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