Hello & Welcome to our community. Is this your first visit? Register

Thanks Thanks:  1
Likes Likes:  4
Dislikes Dislikes:  0
Results 1 to 5 of 5
  1. #1
    Murdock (OP)
    Junior Member
    Join Date
    Apr 2019
    Location
    Kansas
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Fluctuating idle. Sound like a big cam

    I picked up a laid over 2007 FZ6 with only 3200 miles recently and started working on a few modifications.
    Here is what I have done so far.
    1. K&N air filter
    2. Dominator cat delete down pipe
    3. Some Chinese Trash knock off Exhaust ( donít judge me lol )
    4. Power Commander Fuel controller
    I am trying out one of the maps for open exhaust and cat delete. Forgot what brand it is for.
    It runs through the gears pretty damn good.
    The problem is when it idles. It sounds awesome but runs like itís chugging for fuel or gasping for air. I was going to leave it be until I started practicing doing some full lock turns and the chugging was unpredictable. No low speed maneuvers for now.
    The thing is I almost think itís getting to much fuel.
    All the values on the 0 percent throttle side are ď5Ē
    I talked to the local dyno guru. He said he could get it sorted out but I kind of like to figure out if there is anything I can to to tame it.
    I have my idle set about 1200 to 1300 rpms

    Any ideas?

  2. #2
    Vrrroooooom! Fluctuating idle.  Sound like a big cam Motogiro's Avatar
    Join Date
    May 2008
    Location
    San Diego, Ca.
    Posts
    13,670
    Mentioned
    92 Post(s)
    Tagged
    0 Thread(s)

    Re: Fluctuating idle. Sound like a big cam

    to our great forum!

    There are a few things that you might do to help alleviate the condition but keep in mind you've lost a lot of back pressure for a 600 cc engine. All of the mods you have are pointed towards a motor that is supposed to gain ponies at open throttle. Idle is going to be different. Many manufacturers build exhaust control valves into their systems so that when needed, back pressure is released when required and the system can return to a more docile attitude where back pressure and sound pressure are kept more within street standards a regulations.

    A tune is in order for your setup. This will require a reputable tuner with proper equipment to keep healthy A:F ratios. The other way is to, and I hope this doesn't hurt feeling, guess. It may be possible to get into the CO adjustments and add what you need but again, how will this effect the larger picture of what is a healthy mix for your motor.

    I spent hundreds on my FZ6 with a controller, exhaust, air filter and a professional tuner on a dyno. I wanted a healthy A:F so we kept the tune less aggressive. I saw about 4 hp rear wheel gain. I spent the bucks and the bike ran so good but again It was lots of money for the gain.

    Search here for CO adjustment and if you cant get it, talk to your friend. I'll assume it's not, but if your controller is an EX model it won't adjust in the lower rpm range. The other part of having a sniffer in the tail pipe is knowing if your controller is making the percentage changes in the mix that the map reflects.
    Last edited by Motogiro; 04-07-2019 at 12:48 PM.
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

  3. Thanks TownsendsFJR1300 thanked for this post
    Likes FinalImpact liked this post
  4. #3
    Senior Member
    Join Date
    Sep 2016
    Location
    Connecticut
    Posts
    129
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Re: Fluctuating idle. Sound like a big cam

    I personally would replace the plugs. I had a similar issue and the bike had only abut 1k miles and the plugs did it for me.
    At low RPM it ran a bit rough and it felt like it was misfiring a bit, but as soon as I gave it gas it ran like a champ.... go figure... it was getting worse and worse over time so I just yanked those spark plugs out and it fixed the issue... Also you should get the following done...

    https://www.600riders.com/forum/how-...an-richen.html
    Last edited by Ital; 04-08-2019 at 12:15 PM.

  5. Likes Motogiro liked this post
  6. #4
    Vrrroooooom! Fluctuating idle.  Sound like a big cam Motogiro's Avatar
    Join Date
    May 2008
    Location
    San Diego, Ca.
    Posts
    13,670
    Mentioned
    92 Post(s)
    Tagged
    0 Thread(s)

    Re: Fluctuating idle. Sound like a big cam

    Here's an example of possible failure if you actually don't know what mix ratios you have and are changing fuel management and reducing back pressure.
    https://www.600riders.com/forum/gara...ost641742.html

    Sent from Moto's Motorola
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

  7. Likes FinalImpact liked this post
  8. #5
    2 Da Street, Knobs R Gone FinalImpact's Avatar
    Join Date
    Mar 2011
    Location
    USA, OR
    Posts
    10,954
    Mentioned
    133 Post(s)
    Tagged
    1 Thread(s)
    Blog Entries
    1

    Re: Fluctuating idle. Sound like a big cam

    Or just lift the tank and turn all 4 idle sync screws the same amount until the idle stabilizes.
    When happy, call it done.

    If it stalls when coming down from higher revs you may have to tinker some more.
    08 Raven w/a few mods...
    R6 Forks, R1 Rear Shock (revalved), 6į Ignition Advance, S1 CAT free Header, SS Mid-Pipe, 2Bro Exhaust, AIS block off plates, Bazzaz Z-Fi Fuel Controller & Z-AFM Data Logger, Air Box mod, CR10E Plugs, 48-Tooth Rear Sprocket, FZ1 Bars, Spider Grips, Adj levers, Powder Coated -Triple, Bars & Rear Sets, Solid mounted rear-sets w/knurled pegs, Dual Headlight, Tail Tidy, LED Combo Brake & Directionals, LED POD lights & Tinted PUIG Wind Screen!

  9. Likes Motogiro liked this post
 

 

Similar Threads

  1. Replies: 31
    Last Post: 08-09-2018, 03:29 PM
  2. Bad ide sound
    By thisisdylan in forum Garage / Mechanical Help
    Replies: 43
    Last Post: 02-05-2016, 11:10 AM
  3. FZ6 vs FZS 600 sound
    By dimos in forum FZ6 General Discussion
    Replies: 13
    Last Post: 11-26-2011, 04:18 PM
  4. leo's sound?
    By luckyirishboy209 in forum FZ6 Mods
    Replies: 8
    Last Post: 11-11-2008, 11:40 PM
  5. FZ6 - Sound
    By Jadon01 in forum The Bar
    Replies: 10
    Last Post: 10-17-2008, 05:40 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -7. The time now is 05:05 PM.
4.2.5
Image resizer by SevenSkins
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like v3.6.3 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©2007 , All content is property of 600Riders.Com All Rights Reserved. The opinions and posts on this site do not neccesarily reflect those of the site owners or operators.
Yamaha FZ6 and Yamaha rights are property of Yamaha Motor Company. 600Riders.com is not associated with Yamaha in any way. We are an enthusiast site dedicated to the Yamaha FZ6 motorcycles. Our goal is to offer a place for Yamaha FZ6 owners to discuss rides, events, mods, maintenance, purchasing, etc
vBulletin Skin By: PurevB.com