kfx400 backfiring and popping - Suzuki Z400 Forum : Z400 Forums
 
LinkBack Thread Tools
post #1 of 7 (permalink) Old 08-11-2019, 04:15 AM Thread Starter
:::Rookie Rider:::
 
Join Date: Aug 2019
Posts: 3
kfx400 backfiring and popping

hi Guys i got 06 kfx400 and i bought like year ago and the guy said it's bored over .40 and i don't know and it's backfiring and popping when you hit the throttle and sound like it's going to die but still ides fine
Quanjacks19 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 08-11-2019, 09:53 AM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,941
Welcome! Start with cleaning out the jets and the rest of the carb.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
jetmech25 is online now  
post #3 of 7 (permalink) Old 08-12-2019, 10:42 PM
:::Official Spammer:::
 
amcf18's Avatar
 
Join Date: Apr 2010
Location: Quartzsite Az,/ Picton, On
Posts: 3,321
Garage
See what jets are in there while you are cleaning it. Then let us know if it has an airbox lid..

2007 LTZ 400.. 94mm J&E piston, +4mm hotrods crank, 536webb cams,wiseco valves, 39mm fcr, tokyo mods throttle spring, honda thumb throttle,spring removed. yoshimura full exhaust, honda 400ex intake tube, no air box
amcf18 is offline  
 
post #4 of 7 (permalink) Old 08-17-2019, 11:06 AM Thread Starter
:::Rookie Rider:::
 
Join Date: Aug 2019
Posts: 3
i cleaned the carb and the jets and they look like i put them in yesterday and yes it do have airbox lid
Quanjacks19 is offline  
post #5 of 7 (permalink) Old 08-17-2019, 10:01 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,941
Has it ever run right since you had it? Or just started running bad? Been sitting awhile? What jets were installed in it? Adjustable needle or factory?

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
jetmech25 is online now  
post #6 of 7 (permalink) Old 09-02-2019, 11:36 AM Thread Starter
:::Rookie Rider:::
 
Join Date: Aug 2019
Posts: 3
it's was sitting for a while and now it just started out of no where
Quanjacks19 is offline  
post #7 of 7 (permalink) Old 09-02-2019, 12:43 PM
:::Official Spammer:::
 
jetmech25's Avatar
 
Join Date: Apr 2012
Location: San Diego, CA
Posts: 3,941
If it keeps doing it intermittently, Id suspect a wiring problem.

'05 Z
94mm bbk, +4 stroker, Hot Cams, Vertex piston, FMF Power Bomb header and Power Core can, KW black diamond valves/dual springs, FCR39, K&N, Elka long-travel LT fronts and rear, Houser +3, +3/4 LT A-arms, American Star pro xs chromoly tie rods, Dyna non-programable, Tusk +3 axle.
jetmech25 is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Suzuki Z400 Forum : Z400 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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

Password:


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

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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