Backfiring / Popping during shifting - Kawasaki Vulcan Forum : Vulcan Forums
» Insurance
» Sponsors
Go Back   Kawasaki Vulcan Forum : Vulcan Forums > Motorcycle Models > Vulcan 1600

Thread Tools Display Modes
Old 10-25-2012, 09:09 PM   #1
Junior Member
Join Date: Oct 2012
Posts: 7
Default Backfiring / Popping during shifting

Hey Guys - I just got an '07 1600 Classic and it already had V&H Big Shots it. They sound phenomenal, but if I roll off the throttle too quickly from first to second, I get what sounds like backfiring, but I think it's just popping. It doesn't happen in any other gears... up or downshifting. I think it happens from first to second because it's a BIG stretch from first to second. I don't think there are any changes to the air filter and their is no fuel management system installed.

Do I need a fuel management system? If so, what kind do you recommend? I know the PC is the easy / most popular choice, but there are others out there that I've heard some good reviews about. And if I do get the fuel mgmt system, should I just go the rest of the way and get the K&N air filter too?
CobraRider is offline   Reply With Quote
Sponsored Links
Old 10-26-2012, 07:20 AM   #2
Senior Member
puckoach's Avatar
Join Date: Jan 2010
Location: Boston burbs
Posts: 455

The general opinion would be that you need a fuel management system. There are three choices. Dobeck, Cobra, Power Commander. If you go for the PC, don't get the EX model, as it's for California and cannot be dyno tuned.

Do a search, there is a real ton of great input on this subject.

As an example:

The popping might be cured by marbeling. Check gadjets site for details on that.
06 Kawi Vulcan Nomad - Cobra Lite Bar, Phat II Risers, Vista Cruise, Krusier Kady, Kuryakyn Longhorn Dually Pegs, Mustang w/ Backrest, Vance & Hines Dual Baggers, PC III, Cobra Luggage Rack, Electrical Connection LED R,B, T Conversion, Jay Stephens LED Tail Light, Classic Chaps, Avon Cobra's.

Last edited by puckoach; 10-26-2012 at 08:02 AM.
puckoach is offline   Reply With Quote
Old 10-26-2012, 11:44 AM   #3
Top Contributor
Murphy's Avatar
Join Date: Apr 2009
Location: Toronto
Posts: 507

When i had Cobras on my bike, I found shifting a bit sooner got rid of popping.
06 VN1500 Classic Anniversary
Murphy is offline   Reply With Quote
Old 10-26-2012, 01:26 PM   #4
Top Contributor
Pretzel's Avatar
Join Date: Apr 2009
Location: Oklahoma
Posts: 1,554

Check a couple of things first:

1) Check the nuts holding the header pipes for proper torque. If they're loose, there could be a small exhaust leak causing the problem. DO NOT OVERTIGHTEN, again, proper torque!

2) When COOL, check the header pipes for small cracks. Same thing, exhaust leak could be the culprit.

If neither one of those is the issue, a TFI and/or marbling can help as well.
BACA Pretzel - Flyin' the highways in OK!
'08 Vulcan 1600 Nomad - "Grace"
Metallic Diablo Black/Candy Fire Red
LED Run/Turn/Brake
Vance and Hines Duals
Dobeck TFI
Kuryakyn Flame grips with Throttle Boss and Stiletto endcaps
Kuryakyn Longhorn offset highway pegs
Vista throttle lock
OEM light bar and luggage rack

B.A.C.A. Member, Oklahoma Chapter

Out to pasture - 2008 Vulcan 900 Custom: Redemption
Pretzel is offline   Reply With Quote
Old 11-05-2012, 02:06 AM   #5
Senior Member
Join Date: Feb 2012
Location: Sydney Australia
Posts: 173

CobraRider, have you blocked or removed your reed valves?
If not then here's a link you would want to look at.
My stepping stone to what I'm riding now.
Suzuki GSX250 '82
Suzuki GSX-R600 '00
Vulcan VN1600 Classic '06
Fitted: tachometer, genuine windshield, K Drive hard bags, upgraded Meanstreak clutch spring with Judges washers, Cobra Speedster Longshots, Dobeck TFI controller, Chucksters air filter plate, Mustang seats with drivers backrest.

Up coming items: volt meter, oil and temp gauges.
Busboy is offline   Reply With Quote
Old 11-05-2012, 06:59 AM   #6
Top Contributor
whoaru99's Avatar
Join Date: Mar 2010
Posts: 2,611

You don't have to do anything about it if you don't want to.

My V2K will pop when you reopen the throttle after roll off. I have found just changing the way you work the throttle when shifting you can pretty much control whether or not it pops. I'd describe what I do but I can't really's like muscle memory now, just something I automatically do.

Last edited by whoaru99; 11-05-2012 at 07:06 AM.
whoaru99 is online now   Reply With Quote
Old 11-05-2012, 08:54 AM   #7
Senior Member
Join Date: Sep 2012
Location: Eustis, Florida
Posts: 101

I got rid of the baffles in the center pipe and drilled the rear outer baffle on my pipes. That modification allowed me to hear the popping on decel more readily. Note that it is always there but you just dont really hear it with stock pipes. I did the marble trick and it stopped 90% of it immediately. Easy to do. If you just have pipes and have not changed or modified the intake you shouldn't have to go the PC route. Save your money for Christmas!
2003 Vulcan 1600 Classic.

Last edited by Pappyman; 11-05-2012 at 08:22 PM.
Pappyman is offline   Reply With Quote
Sponsored Links

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 01:56 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Forum Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Honda Africa Twin Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Victory Charger Forum Honda Vultus Forum HD LiveWire Forum Ninja H2 Forum
BMW Scrambler Forum Ducati Scrambler Forum Kawasaki Ninja 250SL Forum