Popping sound after installing akrapovic and a k&n filter

abhishekrawat2702 · March 29th, 2012, 08:29 AM

Hi guys..today i got a k&n and an akrapovic slip on installed on myu bike..sounds great without the silencer...only issue i found is it makes a popping soun when i come down from high rpms...do i need a dynokit or rejetting wouls help ...pls advise,..
thanx

cuong-nutz · March 29th, 2012, 08:32 AM

http://www.ninjette.org/forums/showthread.php?t=9948

Skippii · March 29th, 2012, 11:59 AM

Pops on deceleration means you are running too lean. Rejet richer or shim needles.
Posted via Mobile Device

abhishekrawat2702 · April 6th, 2012, 11:45 PM

HELLO THEre guys...i have been told by my mechanic here that 2011 ninja models doesnt have carb and they have ecm...and he cannot do any tunin to remove the backfire or the popping sound from the slip on and neither we can install a dynojet kit in these models....he is suggesting me ecm remapping and sprocket change...
has anyone installed any slip on on 2011 and can you suggest me anything

NEED HELP

Kevin2109 · April 6th, 2012, 11:59 PM

So no one replies the first time so you make a second one? Come on dude

use the damn search button, this topic is

DaBlue1 · April 7th, 2012, 12:22 AM

Quote:

Originally Posted by abhishekrawat2702

HELLO THEre guys...i have been told by my mechanic here that 2011 ninja models doesnt have carb and they have ecm...and he cannot do any tunin to remove the backfire or the popping sound from the slip on and neither we can install a dynojet kit in these models....he is suggesting me ecm remapping and sprocket change...
has anyone installed any slip on on 2011 and can you suggest me anything

NEED HELP

There is not that much remapping of the FI bikes, especially to control popping. Either put the stock exhaust back on or try putting the baffle in the slip on because that is part of what the baffle is for. Baffling noise.

Alex · April 7th, 2012, 12:26 AM

/merged

ninja250r81 · April 7th, 2012, 01:12 AM

do what SKIPPII suggested

change the sprocket???? that's a weird suggestion

find someone else now!!!! before your bike gets hurt

Skippii · April 7th, 2012, 02:02 AM

Any mechanic who thinks this is related to sprockets/ gearing needs a new profession. Unless that was an unrelated comment and your sprockets need to be replaced, in which case I have to ask if you've ever done a chain lube & adjustment on your 1 year old bike.
Posted via Mobile Device

Somchai · April 7th, 2012, 03:09 AM

@Abhishek

The first thing to get away the popping is to use the silencer in your slip-on. Then it should be okay already. But you can close the KLEEN air system also, what I recommend you to do.
Here you can get the plate, order PKR0018 (never mind about the second one): http://powderkegracing.com/Kawasaki%..._ZX12_ZX6.html
or take this from Slingshot: http://www.slingshotracing.net/catal...ate-p-204.html

@Skippii - It must not be lean, it can be to rich also. And please know that in India it is a FI-Version.
Did you ever in your live hear a Raceversion of the Porsche 911 Carrera RSR run? The engine of this car's running really rich and it's popping in up and down shifting...

Matz · April 7th, 2012, 03:24 AM

Have you tried adjusting the length or your entire system?
I don't mean cutting anything, I mean sliding the can up or down the existing stock pipe. Exhaust systems are very sensitive to length, it can affect fuel efficiency and midrange in certain circumstances, ever noticed on bikes that have tiny little stubby exhausts (like the newest Fireblade) that the pipe is all coiled up behind the fairing, it's because they need to maintain a certain length however small they want the overall package to be.

DaBlue1 · April 7th, 2012, 06:30 AM

Quote:

Originally Posted by Somchai

...But you can close the KLEEN air system also, what I recommend you to do.

OP has a FI system. The kleen air can not be removed because it is monitored by a sensor. Removing or altering the sensor would cause the FI indicator light to come on and throw a code.

Somchai · April 7th, 2012, 05:53 PM

Thank you DaBlue1 for clearify.
I forgot to tell, don't disconnect the sensor keep the switch and the sensor connected, but for sure CLOSE the kleen air system.
There is still more you can do and for you to know, it's not that hard to reach 45 up to 49 hp with an EFI-Ninjette.
Especially in India you should connect with Kiirus to remap your ecu, getting 3 to 4 more hp and a cooler temperature in slow moving with also better mpg.

headshrink · April 7th, 2012, 06:00 PM

We talk about rejetting so much around here that it is easy to forget that some users have EFI. I know I rarely look at user statistics unless I have a reason to.... information overload these days and all.

March 29th, 2012, 08:29 AM	#1
abhishekrawat2702 ninjette.org newbie Name: Abhishek Location: New Delhi,India Join Date: Mar 2012 Motorcycle(s): 2011 Ninja 250r Posts: 3	Popping sound after installing akrapovic and a k&n filter Hi guys..today i got a k&n and an akrapovic slip on installed on myu bike..sounds great without the silencer...only issue i found is it makes a popping soun when i come down from high rpms...do i need a dynokit or rejetting wouls help ...pls advise,.. thanx

March 29th, 2012, 08:32 AM	#2
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	http://www.ninjette.org/forums/showthread.php?t=9948 __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

April 6th, 2012, 11:45 PM	#4
abhishekrawat2702 ninjette.org newbie Name: Abhishek Location: New Delhi,India Join Date: Mar 2012 Motorcycle(s): 2011 Ninja 250r Posts: 3	Popping sound after installing akrapovic and a k&n filter HELLO THEre guys...i have been told by my mechanic here that 2011 ninja models doesnt have carb and they have ecm...and he cannot do any tunin to remove the backfire or the popping sound from the slip on and neither we can install a dynojet kit in these models....he is suggesting me ecm remapping and sprocket change... has anyone installed any slip on on 2011 and can you suggest me anything NEED HELP

April 6th, 2012, 11:59 PM	#5
Kevin2109 KThanksBye Name: Kevin Location: Orange County Join Date: Mar 2011 Motorcycle(s): 2006 zx636r Posts: A lot.	So no one replies the first time so you make a second one? Come on dude use the damn search button, this topic is __________________________________________________ ----> My Youtube! <---- Unregistered, watch my youtube page!

April 7th, 2012, 12:26 AM	#7
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	/merged __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

March 29th, 2012, 11:59 AM	#3
Skippii Milkshake Drinker Name: Skippii Location: Richmond, Va Join Date: Aug 2011 Motorcycle(s): 2007 Orange DRZ400-S, 2005 Ninja 250 & Custom Thundercunt Dirt Chopper Posts: A lot.	Pops on deceleration means you are running too lean. Rejet richer or shim needles. Posted via Mobile Device

April 7th, 2012, 01:12 AM	#8
ninja250r81 ninjette.org guru Name: scott Location: australia Join Date: Jan 2012 Motorcycle(s): 2012 ninja 250r se Posts: 435	do what SKIPPII suggested change the sprocket???? that's a weird suggestion find someone else now!!!! before your bike gets hurt

April 7th, 2012, 02:02 AM	#9
Skippii Milkshake Drinker Name: Skippii Location: Richmond, Va Join Date: Aug 2011 Motorcycle(s): 2007 Orange DRZ400-S, 2005 Ninja 250 & Custom Thundercunt Dirt Chopper Posts: A lot.	Any mechanic who thinks this is related to sprockets/ gearing needs a new profession. Unless that was an unrelated comment and your sprockets need to be replaced, in which case I have to ask if you've ever done a chain lube & adjustment on your 1 year old bike. Posted via Mobile Device

April 7th, 2012, 03:09 AM	#10
Somchai Freedom for Germany Location: This World Join Date: May 2011 Motorcycle(s): Ninja 250R-FI Posts: A lot.	@Abhishek The first thing to get away the popping is to use the silencer in your slip-on. Then it should be okay already. But you can close the KLEEN air system also, what I recommend you to do. Here you can get the plate, order PKR0018 (never mind about the second one): http://powderkegracing.com/Kawasaki%..._ZX12_ZX6.html or take this from Slingshot: http://www.slingshotracing.net/catal...ate-p-204.html @Skippii - It must not be lean, it can be to rich also. And please know that in India it is a FI-Version. Did you ever in your live hear a Raceversion of the Porsche 911 Carrera RSR run? The engine of this car's running really rich and it's popping in up and down shifting...

April 7th, 2012, 03:24 AM	#11
Matz is stunning! ;) Name: Matz Location: Elgin, Scotland Join Date: Aug 2011 Motorcycle(s): CBR600 FS2, XT350 Posts: 132	Have you tried adjusting the length or your entire system? I don't mean cutting anything, I mean sliding the can up or down the existing stock pipe. Exhaust systems are very sensitive to length, it can affect fuel efficiency and midrange in certain circumstances, ever noticed on bikes that have tiny little stubby exhausts (like the newest Fireblade) that the pipe is all coiled up behind the fairing, it's because they need to maintain a certain length however small they want the overall package to be. __________________________________________________ It ain't a 250, one of the zeros is missing! My Facebook and Youtube

April 7th, 2012, 05:53 PM	#13
Somchai Freedom for Germany Location: This World Join Date: May 2011 Motorcycle(s): Ninja 250R-FI Posts: A lot.	Thank you DaBlue1 for clearify. I forgot to tell, don't disconnect the sensor keep the switch and the sensor connected, but for sure CLOSE the kleen air system. There is still more you can do and for you to know, it's not that hard to reach 45 up to 49 hp with an EFI-Ninjette. Especially in India you should connect with Kiirus to remap your ecu, getting 3 to 4 more hp and a cooler temperature in slow moving with also better mpg.

April 7th, 2012, 06:00 PM	#14
headshrink ninjette.org certified postwhore Name: Bob Location: CA Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.	We talk about rejetting so much around here that it is easy to forget that some users have EFI. I know I rarely look at user statistics unless I have a reason to.... information overload these days and all. __________________________________________________ Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned

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