F4i - Main Forum Main F4i discussion board

f4i backfires?

  #1  
Old 09-08-2009, 05:24 AM
Junior Member
Thread Starter
Join Date: Jul 2009
Location: gmr
Posts: 27
Default f4i backfires?

i recently installed the o2 sensor eliminator and have a D&D slip-on exhaust. with the D&D i noticed at higher rpm's it will create a popping or backfiring type sound, im talking like 10+rpm and letting the throttle go. is this normal for F4I's? I know with the stock exhaust it didnt do this, but is it normal to change out to a louder exhaust and hear this?

if this is a problem what are the effects on the bike's health? and how to fix? thanks.
 
  #2  
Old 09-08-2009, 07:01 AM
MartiniRossy's Avatar
Senior Member
Join Date: Jul 2008
Location: Belle Plaine, MN
Posts: 363
Default

Re-map needed. Some here may tell you that it's normal... but it's not.
 
  #3  
Old 09-08-2009, 07:33 AM
Zero1080's Avatar
Senior Member
Join Date: Apr 2009
Posts: 1,185
Default

Yeah, I've heard the sound too, but my bike is sitting for the winter, so I'll see next season.
 
  #4  
Old 09-09-2009, 03:25 PM
jonld's Avatar
Senior Member
Join Date: Mar 2005
Location:
Posts: 647
Default

Its a lean condition and its quite bad on the engine.
 
  #5  
Old 09-09-2009, 09:30 PM
Senior Member
Join Date: Nov 2007
Location: Lexington, NC
Posts: 601
Default

yep it's lean

lean means it'll rev a little bit faster and may idle a little high
otherwise you'll get the popping sounds, possibly foul plugs if it's bad enough, and your motor will run hotter
 
  #6  
Old 09-10-2009, 02:04 AM
Junior Member
Thread Starter
Join Date: Jul 2009
Location: gmr
Posts: 27
Default

aite thanks for the responses, after riding it a bit more and paying closer attention to it, it seems to happen on upshifts when i push it hard and do a quick up shift or during deceleration and i let it engine brake. how would i make it run less lean?

edit: im sure it aint actual backfire with flames and all, its just popping quite a bit
 
  #7  
Old 09-10-2009, 07:43 PM
Senior Member
Join Date: Nov 2007
Location: Lexington, NC
Posts: 601
Default

power commander

then download the closest map to the mods on your bike
(not sure if a D&D is one of the maps, but if not just pick another slip on brand and it'll be really close)
 
  #8  
Old 09-12-2009, 04:06 PM
mpz
mpz is offline
Senior Member
Join Date: Oct 2007
Location: chicago or a track near you
Posts: 128
Default

^ +1, worked for me as expected
 
  #9  
Old 09-15-2009, 02:25 AM
Member
Join Date: Nov 2008
Location: Los Angeles CA
Posts: 48
Default

any one with a power commander for sale? lol
 
  #10  
Old 10-01-2009, 07:52 AM
Senior Member
Join Date: Mar 2008
Location: Belleville,IL
Posts: 104
Default

Mine backfires to and at night flames bubble out on deceleration. I have a Jardine RT-1 exhaust.
 

Thread Tools
Search this Thread
Quick Reply: f4i backfires?


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.