Still having popping and backfiring issues - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 05-18-2010, 04:29 PM Thread Starter
Senior Member
Join Date: May 2007
Location: Dayton, OH
Posts: 241
iTrader: (3)
Still having popping and backfiring issues

So I rode a little bit last year when I got the bike back together and just put up with some of the popping and backfiring. But when I was pulling things apart to replace the R/R I happened to notice that the rear carb boot didn't look right. Upon closer inspection it was definitely not on right or lined up right. So that explains the issues I had been having.

So I got the carbs off and back on with the boot lined up, and most of the backfiring seems to be gone, but I noticed something different. I honestly don't know if it's new or if I just never noticed it before. With the bike running, if I hold the throttle at around 3k or 4k rpm (doesn't seem to matter as long as it's constant) I get the occasional popping or backfiring. Both cylinders seem to do it, but the rear more often than the front.

I don't seem to have any vacuum leaks that I can find. Is this a Seafoam problem or should I start looking elsewhere. I just want to finally ride this bike just once without backfiring. Any ideas or help is appreciated.

*edit* I should note that it's a real low level popping and not real loud or noticeable.
Chiron is offline  
Sponsored Links
post #2 of 2 (permalink) Old 05-23-2010, 08:36 PM
CWO3 Navy (Retired)
cliffhusn's Avatar
Join Date: Sep 2008
Location: Maryland
Posts: 722
iTrader: (7)
You have air getting into the exhaust. Check your pipes at the manifold to see if you need new gaskets. Burn a cigarette or a stick of incense and hold it near the pipes and if the smoke moves you have a leak.

The Flag on my bike honors those who serve our Country and those who have served!
cliffhusn is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome