Another newbie with a question

reward · 07-29-2015, 09:46 AM

Hey guys, found this site while doing some research on the Vaquero, been a Vulcan rider for many years & upgraded to a 2012 Vaquero with V&H slash cut slip ons in April. Finally got a little cash saved up & bought a PCV & K&N air filter. When installing I found the bike already had a FI2000 & K&N air filter installed but has quite a bit of decel pop. I removed the FI2000 & while installing the PCV I removed the air box & found that the breather tube at the top had been plugged with a smaller tube & bolt. From what I can tell this goes to an air valve & then splits to the top of each cylinder. Since the PCV instructions said nothing about it I removed the plug upon re-assembly. I downloaded the PC map for the bike with the V&H slip ons & stock air cleaner & installed on the PCV. Been riding some & I still get a significant amount of decel popping. So here's here's my questions:
1. Was I correct in unplugging the breather tube?
2. Should I look for any other mods that could be affecting the operation of the PCV (like the plugged breather tube).
3. Anyone have a better map for my setup?

Thanks in advance!!!

mattman · 07-29-2015, 11:06 AM

1. not sure why it is plugged, esepcially if stock air box. (someone else will have to weigh in on that.)

2. No its your map.

3. Try someone else's map or get the bike dyno tuned. (I have never used someone's, I have always gotten my bikes dyno tuned.)

rick6375 · 07-29-2015, 01:16 PM

The hole in the top of right side breather backing pate does need to be plugged to help prevent popping. Check to make sure all connections in exhaust are tight. Until this is done, you will not eliminate the popping. Also check to see if the throttle body has the Thunder gasket installed, the 1700s are known to have an air leak hear. It will be between the throttle body and intake. The gasket is only about $6 and worth every penny.

**JD Hog** · 07-29-2015, 03:32 PM

Welcome to the forum from Northern California

**ringadingh** · 07-29-2015, 04:37 PM

Welcome aboard!

The Black Knight · 07-29-2015, 06:28 PM

Welcome from Italy!

**smokier** · 07-29-2015, 07:35 PM

Welcome from Iowa...
Look for posts from Ken Vega. He recently went to a PCV with ignition. He is very happy and has 99% of the decel popping eliminated.

Ride safe,
Smokier

Ken Vega · 07-29-2015, 09:13 PM

Quote:

Originally Posted by reward

Hey guys, found this site while doing some research on the Vaquero, been a Vulcan rider for many years & upgraded to a 2012 Vaquero with V&H slash cut slip ons in April. Finally got a little cash saved up & bought a PCV & K&N air filter. When installing I found the bike already had a FI2000 & K&N air filter installed but has quite a bit of decel pop. I removed the FI2000 & while installing the PCV I removed the air box & found that the breather tube at the top had been plugged with a smaller tube & bolt. From what I can tell this goes to an air valve & then splits to the top of each cylinder. Since the PCV instructions said nothing about it I removed the plug upon re-assembly. I downloaded the PC map for the bike with the V&H slip ons & stock air cleaner & installed on the PCV. Been riding some & I still get a significant amount of decel popping. So here's here's my questions:
1. Was I correct in unplugging the breather tube?
2. Should I look for any other mods that could be affecting the operation of the PCV (like the plugged breather tube).
3. Anyone have a better map for my setup?

Thanks in advance!!!

I am currently using a former members map that he derived from a dyno tune. But he had exactly the same setup I have. It feels like the map is on the money for me. I tweaked a few things in the fuel map at 0 throttle and in the ignition map at 0 throttle. It solved my popping problem. I get an odd pop on a rare occassion when the bike is really warm at 2100 rpm when the ECU pulls timing to avoid ping and knock.

The Pair Valve hose should absolutely remain plugged, stock airbox or not. If you dont it will pop for sure, even with a perfect map.

lar · 07-30-2015, 12:49 AM

Welcome from New Hampshire.

reward · 07-30-2015, 01:05 PM

Eureka!!!!! Plug the breather hose & the decel pop is almost down to nothing!!!! Seems to have a little more torque as well. Thank you for the info & great welcomes, I have gained much knowledge here already!!! I am going to mess with the settings a little more to see if I can eliminate some of the random popping.

07-29-2015, 09:46 AM	#1
reward Jr. Member Join Date: Jul 2015 Location: Manchester, IA Posts: 40	Another newbie with a question Hey guys, found this site while doing some research on the Vaquero, been a Vulcan rider for many years & upgraded to a 2012 Vaquero with V&H slash cut slip ons in April. Finally got a little cash saved up & bought a PCV & K&N air filter. When installing I found the bike already had a FI2000 & K&N air filter installed but has quite a bit of decel pop. I removed the FI2000 & while installing the PCV I removed the air box & found that the breather tube at the top had been plugged with a smaller tube & bolt. From what I can tell this goes to an air valve & then splits to the top of each cylinder. Since the PCV instructions said nothing about it I removed the plug upon re-assembly. I downloaded the PC map for the bike with the V&H slip ons & stock air cleaner & installed on the PCV. Been riding some & I still get a significant amount of decel popping. So here's here's my questions: 1. Was I correct in unplugging the breather tube? 2. Should I look for any other mods that could be affecting the operation of the PCV (like the plugged breather tube). 3. Anyone have a better map for my setup? Thanks in advance!!! Login or Register to Remove Ads
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07-29-2015, 11:06 AM	#2
mattman Member Join Date: Jun 2015 Posts: 73	1. not sure why it is plugged, esepcially if stock air box. (someone else will have to weigh in on that.) 2. No its your map. 3. Try someone else's map or get the bike dyno tuned. (I have never used someone's, I have always gotten my bikes dyno tuned.) __________________ 2012 Voyager ABS Last edited by mattman; 07-29-2015 at 02:29 PM.
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07-29-2015, 01:16 PM	#3
rick6375 Member Join Date: Dec 2013 Location: New Castle, In. Posts: 365	The hole in the top of right side breather backing pate does need to be plugged to help prevent popping. Check to make sure all connections in exhaust are tight. Until this is done, you will not eliminate the popping. Also check to see if the throttle body has the Thunder gasket installed, the 1700s are known to have an air leak hear. It will be between the throttle body and intake. The gasket is only about $6 and worth every penny. __________________ 2005 800 Classic 2012 Voyager ABS
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07-29-2015, 03:32 PM	#4
JD Hog Join Date: Mar 2014 Location: Placerville, CA Posts: 2,953	Welcome to the forum from Northern California __________________ Jim Diebolt 2015 Vulcan 1700 Voyager ABS The Black Kaw 2005 Vulcan Nomad Sold 2006 Honda 1800 VTX (Freebie) Sold 2008 Harley Ultra Classic Sold 2001 Harley Ultra Classic Sold Hangtown, Kalifornia VBA #2625
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07-29-2015, 04:37 PM	#5
ringadingh Join Date: Aug 2007 Location: Newmarket Ontario Canada Posts: 35,387	Welcome aboard! __________________ 2002 Nomad aka Bountyhunter VBA #27 VROC #18951 Login or Register to Remove Ads
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07-29-2015, 06:28 PM	#6
The Black Knight Top Contributor Join Date: Nov 2013 Location: Italy Posts: 6,071	Welcome from Italy! __________________ VBA 02514 - VROC 35394 VN 800 A - VN 900 Classic VN 1700 Vaquero Usque ad finem.
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07-29-2015, 07:35 PM	#7
smokier Join Date: May 2015 Location: DBQ Iowa Posts: 1,807	Welcome from Iowa... Look for posts from Ken Vega. He recently went to a PCV with ignition. He is very happy and has 99% of the decel popping eliminated. Ride safe, Smokier __________________ You only get one, so "Make it the best day ever!" 2014 Victory Cross County Tour Blue Fire Gloss (BFG) "Cruella" Brides Ride: 2012 Victory Crossroads in Sunset Red "Ruby" Previous Vulcans: '15 Vaquero, '12 Vaquero, '10 1700 Nomad, '04 1500 Classic, '01 1500 Classic, '88 Vulcan 750 VROC # 10967 \| VBA # 3115
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07-30-2015, 12:49 AM	#9
lar Sr. Member Join Date: Jun 2010 Location: Concord, NH Posts: 1,407	Welcome from New Hampshire. __________________ Larry Martel 02 1500 Nomad VBA 01565 VROC4737 Patriot Guard Rider
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07-30-2015, 01:05 PM	#10
reward Jr. Member Join Date: Jul 2015 Location: Manchester, IA Posts: 40	Eureka!!!!! Plug the breather hose & the decel pop is almost down to nothing!!!! Seems to have a little more torque as well. Thank you for the info & great welcomes, I have gained much knowledge here already!!! I am going to mess with the settings a little more to see if I can eliminate some of the random popping.
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