All Things Moto! Dirtbike Forums  

Go Back   All Things Moto! Dirtbike Forums > Dirt Bike - ATV - Suspension Forums > 4-Stroke Dirt Bike Bike Forums > 4-Stroke Dirt Bikes - Yamaha

Reply
 
LinkBack Thread Tools
  #1  
Old 05-23-2016, 03:33 PM
Beginner Class
 
Join Date: Jul 2011
Last Online: 05-26-2016 03:07 PM
Location: brentwood ca
Posts: 21
Default 2001 yz250f idle trouble

ok so kinda a long story. my dirt bike was garaged for 2 years without draining the carb. so these past 2 weeks ive been working on it and ordering parts. i have a rough idle after cleaning the carb and all the jets. also when i hit the throttle the rpms will hang for a little unless i hit the throttle a few more times. could this be something to do with the slide plate in the carb not closing all the way? also my spark plug looked carbon fouled. so these are the parts i have on the way. new slide plate seal, oem slow jet, new spark plug, and an adjustable fuel screw.

so do you guys have any tips on getting a nice idle? i just got some 91 octane i was running this the cheap stuff cause thats all i had at the time. how should i go about adjusting the fuel screw and idle. my elevation is about sea level if that helps out.

thank you for taking the time to read this any advice would be appreciated.
Reply With Quote
  #2  
Old 05-23-2016, 06:16 PM
ATM! Addict
 
Join Date: Jul 2011
Last Online: 11-07-2021 11:42 AM
Location: Benton, LA
Posts: 5,021
Default

Unless you take the carb apart and do a soaking clean, you may still have idle and running issues. This is due to small opening in the carb may be clogged or partially clogged. The accelerator pump diaphram may also be dried out and in need of replacement.
After the carb is cleaned and the new parts installed, set the fuel screw at about 2 turns out from lightly sealed. Then it is just trial and error from there to get the best throttle response. Remember the fuel screw has an effect all the way up the rpm range.

Paw Paw
Reply With Quote
Reply

  All Things Moto! Dirtbike Forums > Dirt Bike - ATV - Suspension Forums > 4-Stroke Dirt Bike Bike Forums > 4-Stroke Dirt Bikes - Yamaha


Thread Tools


Similar Threads for: 2001 yz250f idle trouble
Thread Thread Starter Forum Replies Last Post
2001 yz 125 trouble link 2-Stroke Dirt Bikes - Yamaha 3 11-26-2012 11:24 AM
2001 YZ250F compatibility with 2002 YZ250F Mattman94 4-Stroke Dirt Bike Bike Forums 5 11-27-2011 10:47 AM
2001 Kx 250 trouble HELP!!!! buck12point2009 2-Stroke Dirt Bikes - Kawasaki 3 08-17-2007 11:39 AM
2001 Kx 250 trouble HELP!!!! buck12point2009 2-Stroke Dirt Bike Forums 6 08-14-2007 06:27 PM
2001 YZ250F idle problems PLongman 4-Stroke Dirt Bikes - Yamaha 3 06-23-2005 01:13 PM


All times are GMT -6. The time now is 08:45 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright ©2002-2020, JDub Consulting, Inc. All Right Reserved.