Backfiring and popping

Keenan84 · April 18th, 2010, 07:54 AM

need some info, when i let off the throttle in a higher gear at high speeds, i get a lot of popping and backfiring as the engine slows down. is there a way to fix this? will removing the kleen air system help? its not very common and i can avoid it if i remember, but its just annoying.

Snake · April 18th, 2010, 08:01 AM

Cleaning your air filter may help if it is dirty and clogged.

g21-30 · April 18th, 2010, 08:35 AM

Keenan,

Have you done any mods? If so, what are they?

CC Cowboy · April 18th, 2010, 11:15 AM

Quote:

Originally Posted by Keenan84

need some info, when i let off the throttle in a higher gear at high speeds, i get a lot of popping and backfiring as the engine slows down. is there a way to fix this? will removing the kleen air system help? its not very common and i can avoid it if i remember, but its just annoying.

Un-spent gas.

kkim · April 18th, 2010, 11:23 AM

Quote:

Originally Posted by g21-30

Keenan,

Have you done any mods? If so, what are they?

yes... this.

Racer x · April 18th, 2010, 02:44 PM

If you have an after market exhaust plug the top of the valve cover .It is=will stop the popping.

Dano · April 18th, 2010, 07:44 PM

Quote:

Originally Posted by Racer x

If you have an after market exhaust plug the top of the valve cover .It is=will stop the popping.

What do you mean plug the top of the valve cover? Could it also mean his bike is still running too lean that the jets are the wrong size for his bike?

Momaru · April 18th, 2010, 07:52 PM

Quote:

Originally Posted by Dano

What do you mean plug the top of the valve cover?

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

Keenan84 · April 20th, 2010, 04:20 PM

the only thing ive done is put on a slip on yoshi. i know it makes it run a little leaner...

Snake · April 20th, 2010, 04:33 PM

If it runs a little leaner you may want to adjust the air/fuel mixture to richen it up. The ninjettes allready run a little lean from the factory.

kkim · April 20th, 2010, 04:35 PM

remove the Kleen air system.

also, consider shimming the needles, if you want a better responding bike.

Dano · April 21st, 2010, 07:23 PM

ok i see what they mean about plugging the hole, mine is a non calif model so no hole to plug.

kkim · April 21st, 2010, 07:52 PM

Quote:

Originally Posted by Dano

mine is a non calif model so no hole to plug.

yes there is... mine is a non cali bike. Did you look at the link posted?

Momaru · April 21st, 2010, 09:01 PM

Evap system and Kleen air are different systems, though the evap does feed in to the Kleen air. Evap is cali only, Kleen is on everyone (carb'd at least).

April 18th, 2010, 07:54 AM	#1
Keenan84 ninjette.org member Name: Keenan Location: Newmarket, Ontario Join Date: Jan 2010 Motorcycle(s): 2009 Kawasaki Ninja 250r Special Edition Posts: 217	Backfiring and popping need some info, when i let off the throttle in a higher gear at high speeds, i get a lot of popping and backfiring as the engine slows down. is there a way to fix this? will removing the kleen air system help? its not very common and i can avoid it if i remember, but its just annoying.

April 21st, 2010, 09:01 PM	#14
Momaru ninjette.org certified postwhore Name: Paul Location: Roanoke, VA Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.	Evap system and Kleen air are different systems, though the evap does feed in to the Kleen air. Evap is cali only, Kleen is on everyone (carb'd at least). __________________________________________________ Proud member of the Blue Army

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April 18th, 2010, 08:01 AM	#2
Snake ninjette.org certified postwhore Name: Rick Location: Alexandria, Louisiana Join Date: Jan 2009 Motorcycle(s): 05 Blue Ninja 250 Posts: Too much. MOTY - 2017, MOTM - Jan '19, Oct '16, May '14	Cleaning your air filter may help if it is dirty and clogged.

April 18th, 2010, 08:35 AM	#3
g21-30 ninjette.org certified postwhore Name: Sam Location: Northern Virginia Join Date: Nov 2008 Motorcycle(s): Ninja 250R 2009 and ZX-12R 2000 Posts: A lot.	Keenan, Have you done any mods? If so, what are they?

April 18th, 2010, 02:44 PM	#6
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	If you have an after market exhaust plug the top of the valve cover .It is=will stop the popping.

April 20th, 2010, 04:20 PM	#9
Keenan84 ninjette.org member Name: Keenan Location: Newmarket, Ontario Join Date: Jan 2010 Motorcycle(s): 2009 Kawasaki Ninja 250r Special Edition Posts: 217	the only thing ive done is put on a slip on yoshi. i know it makes it run a little leaner...

April 20th, 2010, 04:33 PM	#10
Snake ninjette.org certified postwhore Name: Rick Location: Alexandria, Louisiana Join Date: Jan 2009 Motorcycle(s): 05 Blue Ninja 250 Posts: Too much. MOTY - 2017, MOTM - Jan '19, Oct '16, May '14	If it runs a little leaner you may want to adjust the air/fuel mixture to richen it up. The ninjettes allready run a little lean from the factory.

April 20th, 2010, 04:35 PM	#11
kkim Join Date: Nov 2008 Posts: Too much.	remove the Kleen air system. also, consider shimming the needles, if you want a better responding bike.

April 21st, 2010, 07:23 PM	#12
Dano ninjette.org sage Name: Dan Location: Perryopolis, PA Join Date: Mar 2010 Motorcycle(s): 09' Blue Ninja 250R and 07' Honda 919 Posts: 605	ok i see what they mean about plugging the hole, mine is a non calif model so no hole to plug.