popping and backfire - Page 2

RACNRAY · 04-30-2014, 09:40 AM

Quote:

Originally Posted by dhobbs74

You wouldn't happen to have a picture of this hose would you? I'm trying to figure out where it is on the air box

Remove the right side air box cover and look at about the 11:00 oclock position of the black back part of the air box, you will see a hole. on the back side of that hole is the hose that needs to be plugged up.

RACNRAY

vaquero convert · 04-30-2014, 10:15 AM

As per RACNRAY'S suggestion. I plugged this port with black silicone. It did eliminate 80% of the backfiring after I installed the slash cuts. I'm guessing a PCV and a good tune would make it perfect.

cndfireman · 04-30-2014, 01:16 PM

I also did the marble in the hose fix and installed a gasket in between the intake and throttle plate as other posts have suggested. I have noticed a 90% improvement in the popping on decel. Something I can definitely live with until I can find 500$ for a fuel processor.

Mav1 · 04-30-2014, 04:30 PM

Quote:

Originally Posted by RACNRAY

Remove the right side air box cover and look at about the 11:00 oclock position of the black back part of the air box, you will see a hole. on the back side of that hole is the hose that needs to be plugged up.

RACNRAY

I have the FP true duals installed with stock air intake. Would it be a good idea to plug this hose for this setup also?

Tynker · 04-30-2014, 09:11 PM

Quote:

Originally Posted by Mav1

I have the FP true duals installed with stock air intake. Would it be a good idea to plug this hose for this setup also?

It would be a good idea to plug the hose even if you did nothing else to your bike. ALL Kawasaki's V-Twins need to have this hose plugged.

**2Paps** · 05-01-2014, 02:21 AM

Quote:

Originally Posted by Tynker

It would be a good idea to plug the hose even if you did nothing else to your bike. ALL Kawasaki's V-Twins need to have this hose plugged.

Why is that?

kc_voyager · 05-08-2014, 12:19 AM

I've marbled the hose, changed the crush washers and a friend has tried the Fuel programer, both our bikes pop on decel. Its worse if you dont close the throttle completely. My thinking is that its cool air being sucked back into the mufflers creating popping when it hits the hot air and metal inside the muffler. Trying some drag baffles in the inlet to the slip-ons, ordered them tonight. Check out the GREAT advice I got on a tread I started, "Taming V&H slip-ons"

The Black Knight · 05-08-2014, 03:46 AM

jesse d · 05-08-2014, 08:28 AM

Just listen to racnray ........the man is the best and most accurate on kawasaki mechanics.......

Mav1 · 05-08-2014, 09:27 AM

Quote:

Originally Posted by RACNRAY

Remove the right side air box cover and look at about the 11:00 oclock position of the black back part of the air box, you will see a hole. on the back side of that hole is the hose that needs to be plugged up.

RACNRAY

Plugged the hole and took a nice ride the other day. Definite improvement on the popping and backfiring on decel. Probably more than 70% better.

dhobbs74 · 05-08-2014, 11:59 AM

Quote:

Originally Posted by Mav1

Plugged the hole and took a nice ride the other day. Definite improvement on the popping and backfiring on decel. Probably more than 70% better.

I took the airbox off and I see the hole. Do I just plug the hole or do I take the hose off and plug the hose

0vationdave · 05-08-2014, 12:14 PM

Quote:

Originally Posted by Tynker

It would be a good idea to plug the hose even if you did nothing else to your bike. ALL Kawasaki's V-Twins need to have this hose plugged.

Even with a stock exhaust?

Mav1 · 05-08-2014, 04:17 PM

Quote:

Originally Posted by dhobbs74

I took the airbox off and I see the hole. Do I just plug the hole or do I take the hose off and plug the hose

Okay......filled 'er up with 89 octane today and took a nice ride. I have to say I was smiling ear to ear the whole time now that the significant popping and backfiring is reduced. There is still a little bit, but totally tolerable.
The combo of Cobra Power Pro, FP Exhaust, Corbin seat, and Ray's throttle mod have turned this Vaq into the finest ride ever (for me)! It sounds unbelievable and runs with smooth power now. Can't wait for my first long trip in June.

For plugging the hole, I believe the "right" way to do it would be to pull the hose and plug it with a marble. I took the easy way out and plugged the hole from the front with a good dose of clear silicone with a 204degrees C rating. After my last ride, I pulled the cover and the silicone looked fine and was intact. I'll check it again in a couple of weeks.

hlknvlcn60 · 06-07-2014, 07:54 PM

Vulcanhunterbagger...I have the same backfiring prob with the Cobra FI2000R pro auto tuner and Vance and Hines 2-1 pro pipe on my Vaquero also....and I know my system is tight, I always do my own exhaust work and re-torque the nuts a few times. It is likely the pair system and a tech at the local Kaw stealership here in town agrees. I had the same problem on my '02 Kaw meanstreak 1500 and eliminated the problem by taking out the whole smog system and plugging the valve off going into the throttle body. I am mounting a new intake from Roaring Toyz next week and when I take off the stock air bowl on the left side, should expose that hose going to the pair system. I will plug it off and report the results later after test riding. HOPE IT WORKS RACNRAY THANKS FOR THE TIP!!

99xcsp · 06-08-2014, 10:09 AM

RACNRAY, hello. New guy here!..Thinking about plogging this kleen are hose on my 13 Voyager, is there any long term negative effects to the engine that your aware of? or is this just a emission / smog thing. I currently have the Cobra slip on's with a FI2000R tuner, I also added that Thunder gasket to the Throttle body. Bike runs well!!.Just still just a little nagging exhaust pop every now and then.
Thanx in advance!

04-30-2014, 10:15 AM	#17
vaquero convert Member Join Date: Jan 2014 Location: Belleville, New Jersey Posts: 64	As per RACNRAY'S suggestion. I plugged this port with black silicone. It did eliminate 80% of the backfiring after I installed the slash cuts. I'm guessing a PCV and a good tune would make it perfect. __________________ ---------------------------------------- Not a Vaquero but a 2011 Voyager ABS Mods: Avon Grips with Ray's Throttle Mod Vance and Hines slipons
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04-30-2014, 01:16 PM	#18
cndfireman Member Join Date: Apr 2009 Location: long sault ontario Posts: 113	I also did the marble in the hose fix and installed a gasket in between the intake and throttle plate as other posts have suggested. I have noticed a 90% improvement in the popping on decel. Something I can definitely live with until I can find 500$ for a fuel processor.
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05-08-2014, 12:19 AM	#22
kc_voyager Member Join Date: Oct 2013 Location: Colorado Posts: 66	I've marbled the hose, changed the crush washers and a friend has tried the Fuel programer, both our bikes pop on decel. Its worse if you dont close the throttle completely. My thinking is that its cool air being sucked back into the mufflers creating popping when it hits the hot air and metal inside the muffler. Trying some drag baffles in the inlet to the slip-ons, ordered them tonight. Check out the GREAT advice I got on a tread I started, "Taming V&H slip-ons"
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05-08-2014, 03:46 AM	#23
The Black Knight Top Contributor Join Date: Nov 2013 Location: Italy Posts: 6,032
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05-08-2014, 08:28 AM	#24
jesse d Member Join Date: Oct 2013 Location: tulsa ok Posts: 180	Just listen to racnray ........the man is the best and most accurate on kawasaki mechanics.......
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06-07-2014, 07:54 PM	#29
hlknvlcn60 Advanced Member Join Date: Jun 2014 Location: crooked river ranch oregon Posts: 723	Vulcanhunterbagger...I have the same backfiring prob with the Cobra FI2000R pro auto tuner and Vance and Hines 2-1 pro pipe on my Vaquero also....and I know my system is tight, I always do my own exhaust work and re-torque the nuts a few times. It is likely the pair system and a tech at the local Kaw stealership here in town agrees. I had the same problem on my '02 Kaw meanstreak 1500 and eliminated the problem by taking out the whole smog system and plugging the valve off going into the throttle body. I am mounting a new intake from Roaring Toyz next week and when I take off the stock air bowl on the left side, should expose that hose going to the pair system. I will plug it off and report the results later after test riding. HOPE IT WORKS RACNRAY THANKS FOR THE TIP!!
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06-08-2014, 10:09 AM	#30
99xcsp Member Join Date: May 2014 Location: Warren, MI Posts: 72	RACNRAY, hello. New guy here!..Thinking about plogging this kleen are hose on my 13 Voyager, is there any long term negative effects to the engine that your aware of? or is this just a emission / smog thing. I currently have the Cobra slip on's with a FI2000R tuner, I also added that Thunder gasket to the Throttle body. Bike runs well!!.Just still just a little nagging exhaust pop every now and then. Thanx in advance!
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