klx300r low end flat spot (new bike!) help!

  #1  
Old 08-17-2006, 05:25 PM
Junior Member
Thread Starter
Join Date: Aug 2006
Posts: 1
Default klx300r low end flat spot (new bike!) help!

hi everyone. i just bought a 2004 klx300r yesterday and when i test rode it had a flat spot right off of idle then picked up the r's after about 1/4 throttle. i assumed the carb may be dirty as the fellow only rode it once and it sat in the garage for 2 years! i cleaned the jets last night and that didnt seem to work. any ideas? i have noticed that the air screw has a cap on it and i suspect that this may be out of adjustment or maybe i didn't clean the air passage good enough. help! it's a new bike with 44 miles on it! thanx
 
  #2  
Old 09-13-2006, 07:19 AM
Junior Member
Join Date: Sep 2006
Posts: 1
Default RE: klx300r low end flat spot (new bike!) help!

I was hoping to see a reply to this thread. I have recently done exactly what you did. Bought a 2004 KLX300R that has 31 miles on it. Has been sitting in a garage covered for almost 2 years. When I first brought it home it would not idle. So I took the carb apart and found the pilot jet clogged. So I cleaned the jet as well as the entire carb. It starts and idles great now, but has a flat spot when cracking the throttle from idle.
 
  #3  
Old 09-28-2006, 01:57 PM
MaverickAus's Avatar
Senior Member
1st Gear Member
Join Date: Jan 2006
Location:
Posts: 3,481
Default RE: klx300r low end flat spot (new bike!) help!

did you clean out the tank and use fresh fuel? new plug? try posting in the KLX250S section for more responses
 
  #4  
Old 09-28-2006, 03:33 PM
EMS_0525's Avatar
Da dirty moderator
1st Gear Member
Join Date: May 2006
Location: Pittsburgh, PA
Posts: 12,584
Default RE: klx300r low end flat spot (new bike!) help!

maybe its not jetted right, or the air/fuel screw is not in the right place...
 
  #5  
Old 12-25-2006, 09:03 AM
Senior Member
1st Gear Member
Join Date: Oct 2006
Location: Misawa Japan
Posts: 3,106
Default RE: klx300r low end flat spot (new bike!) help!

Are you both running stock exhausts? If so, is the buttplug in or out?What about airbox mods or aftermarket air cleaners?

If it'sstumbling just off of idle, try adjusting the fuel screw. The EPA plug can be removed by carefully drilling a small hole in the plug,then using a sheet metal screw to pull it out. You will need to gently bottom out the screw while counting the turns to find-out where it was originally set. Once you have it back to the original setting, try adding 1/2 turn CCW (richer), than checking to see if off-idle performance has improved.

Good luck! Once you have the carb off the bike, it might be a good idea to see if you still have the stock main jet size installed. This would tell you if someone has already been tinkering with it.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Red Brigade
KLX 250S
8
06-24-2015 11:39 AM
sanpedro
KLX 250S
15
10-18-2010 05:41 PM
beebop
KLX 250S
7
07-04-2010 04:43 PM
Lucky Intervale
KLX 250S
9
11-03-2008 01:17 PM
N3WWL
ZZR 600
9
08-10-2008 12:19 AM


Thread Tools
Search this Thread
Quick Reply: klx300r low end flat spot (new bike!) help!


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.