Backfiring and Sneezing back through Air Filter - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-03-2014, 10:54 AM Thread Starter
Junior Member
Join Date: Jun 2014
Posts: 2
Backfiring and Sneezing back through Air Filter

Hello all, i would love some help as this bike is driving me nuts...

I purchased a 2007 Vstar1100 Silverado a few months ago with 2700 miles. It has a hypercharger and Bub pipes (not sure if its jetted).

I have put about 1000 miles on the bike since i purchased it and it has ran flawlessly.

About 100-150 miles ago it started to backfire and occasionally “sneeze” back through the air filter when I let off the throttle.

I did a bit of research and here is the troubleshooting I have done so far:

1. Removed “the lazy way” the AIS system – no change
2. Tried to find an air leak via carb cleaner – no luck
3. Tightened the exhaust pipes – no Change
4. Cleaned the carbs – This was my first time doing this so I went as far as removing to cover, removing the spring and spraying cleaner inside and around the carb. - No change
5. Checked the spark plugs – they look good to me – tiniest bit of whitish tint to them but look fine to me.

Over the last 100-150 miles the backfiring has gotten worse, the sneezing has gotten worse but it only seems to sneeze when I try to blip the throttle.

If I am on the throttle the bike runs fine its when im trying to blip or take off it sneezes and then when I let off, it backfires ,ometimes it scares me ha ah

cmasonrun is offline  
Sponsored Links
post #2 of 3 (permalink) Old 06-03-2014, 06:19 PM
Senior Member
Sick Mick's Avatar
Join Date: Oct 2011
Location: Corona De Tucson, AZ
Posts: 2,181
The most obvious thing to do is to synch the carbs if it hasn't been done. Then see if the problem is still there.

Sick Mick* 2006 V Star 1100 Custom

--- Striping, lettering and paint by Sick Mick – 6* Tree - 2" extended forks – 21" front wheel - HK Sideburners - Progressive rear shock – Pods – Sick Mick solenoid delete - Spring seat - and other stuff
Sick Mick is offline  
post #3 of 3 (permalink) Old 06-03-2014, 09:19 PM
Senior Member
Slayer's Avatar
Join Date: Feb 2014
Location: Germanton, NC
Posts: 417
+1 on the carbs sync'd first including adjusting the mixture correctly. Too lean and you get ignition in the intake, too rich and you get ignition in the exhaust.

If you still have the problem, make sure the ignition timing is correct.

Then if you still have the problem, adjust the valves.

2013 Yamaha V Star 1300 Deluxe
2011 Yamaha Grizzly 700 EPS
Slayer is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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 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
Trackbacks are On
Pingbacks are On
Refbacks are On

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