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

Results 1 to 2 of 2
  1. #1

    Default Off then on throttle lag 5k-6krpm

    Hi all,

    Hoping for some advice...

    My bike following having the throttle bodies out and a ECU remap has a lag and a backfire between 5-6k rpm, but only when i come completely off throttle and then back on. All other rev ranges are ok.

    I previously decat the pipe, mivv suono end can and Lars Airbox mod with a k&n filter and the bike ran mint.

    I then decided to mod the flies with copperdawgs and remapped the ECU with ftecu and using dukes map pack. once all back together the subthrottle plate seized. Had them out and a good penetrating oil and a bit of acetone got them free (I assumed it must've been a rogue drop of locktite from the flies). The bike runs like a beast but if I come off throttle at high revs then back on throttle, even if I slowly come on the bike bogs, backfires then a surge of power again.... only between 5-6k maybe 7k

    I changed the spark plugs but that hasnt made a difference.... also removed and reinstalled throttle bodies to ensure it wasn't a vacuum leak....

    Does anyone have any advice?

    Last edited by JonesKi; 04-28-2019 at 01:27 PM.

  2. #2


    you need to go back to wherever you went to have your ecu flashed and have them fix the tune.



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 -8. The time now is 05:31 AM.
Powered by vBulletin® Version 4.2.5
Copyright © 2019 vBulletin Solutions Inc. All rights reserved.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Copyright 2008 , All content is property of 998cc.org All Rights Reserved. The opinions and posts on this site do not necessarily reflect those of the site owners or operators. Yamaha FZ1 and Yamaha rights are property of Yamaha Motor Company. 998cc.org is not associated with Yamaha in any way. We are an enthusiast site dedicated to the Yamaha FZ1 motorcycles. Our goal is to offer a place for Yamaha FZ1 owners to discuss rides, events, mods, maintenance, purchasing, etc.
vBulletin Skin By: PurevB.com