Running rich? Or running naked?

  #1  
Old 11-20-2007, 12:49 AM
kawikathy's Avatar
Senior Member
1st Gear Member
Thread Starter
Join Date: Aug 2007
Location: Phoenix, AZ - But It's A Dry Heat!
Posts: 521
Default Running rich? Or running naked?

Why is my bike running rich? I did all the carb mods several months ago (I've put at least 2000 miles on it since) and last week I checked the plug (light gray) and the HMF muffler looked pretty clean inside - after riding this weekend I checked the muffler exhaust and it is thick with black carbon deposits. I also noticed some backfiring for the first time at around 70 to 80 mph when decelerating - what gives?
 
  #2  
Old 11-20-2007, 12:53 AM
zzrick's Avatar
Senior Member
1st Gear Member
Join Date: Jun 2007
Location: Liberty Twnshp, OH
Posts: 8,820
Default RE: Running rich? Or running naked?

Sounds like it is jetted wrong, what did you do to the carbs recently?
 
  #3  
Old 11-20-2007, 12:57 AM
kawikathy's Avatar
Senior Member
1st Gear Member
Thread Starter
Join Date: Aug 2007
Location: Phoenix, AZ - But It's A Dry Heat!
Posts: 521
Default RE: Running rich? Or running naked?

I haven't touched it since the mods. It was running so good too!
 
  #4  
Old 11-20-2007, 12:58 AM
zzrick's Avatar
Senior Member
1st Gear Member
Join Date: Jun 2007
Location: Liberty Twnshp, OH
Posts: 8,820
Default RE: Running rich? Or running naked?

HAs the weather changed alot in your area since you adjusted them?
 
  #5  
Old 11-20-2007, 01:00 AM
2k1w=no$'s Avatar
Senior Member
1st Gear Member
Join Date: Sep 2006
Location: Bangor, PA
Posts: 1,399
Default RE: Running rich? Or running naked?

I would blame it on the person that did the carb work. I will also say:[sm=ttiwwp.gif]
(of you running naked of course)
 
  #6  
Old 11-20-2007, 01:03 AM
Nobrakes's Avatar
Admin
1st Gear Member
Join Date: Jan 2006
Posts: 7,269
Default RE: Running rich? Or running naked?

Generally if the weather cools down that would make it run leaner since the air is more dense but the fuel delivery is the same. Are you sure it's not running leaner? Decel popping generally indicates a lean condition.

Quick test - try restricting the airbox a little and see if it gets better or gets worse. If it gets better, you're lean, if it gets worse, you're rich. Try raising or lowering the needle one clip position accordingly and/or increase or decrease the main jet one size. Readjust the pilot circuit afterwards.

 
  #7  
Old 11-20-2007, 01:03 AM
Senior Member
1st Gear Member
Join Date: Apr 2006
Location:
Posts: 1,677
Default RE: Running rich? Or running naked?

Air filter dirty or over oiled? Mine went from rich to lean after cleaning the filter.....oops[:@]
 
  #8  
Old 11-20-2007, 01:04 AM
klx250s_rider's Avatar
Senior Member
1st Gear Member
Join Date: May 2007
Location: Land of Sun, Sand and Thorns - AZ
Posts: 1,484
Default RE: Running rich? Or running naked?

Alright I did her carb mods, and maybe I had one too many beers when I was doing it plus she was wearing a bikini top while handing me tools - give me a break guys!
 
  #9  
Old 11-20-2007, 01:09 AM
kawikathy's Avatar
Senior Member
1st Gear Member
Thread Starter
Join Date: Aug 2007
Location: Phoenix, AZ - But It's A Dry Heat!
Posts: 521
Default RE: Running rich? Or running naked?

NoBrakes, I'll check the filter and put the KDX snorkel back on an try it. The weather has cooled down from the high 90's into the mid-80's, same low humidity (10%).

Mark I told you to keep your eyes on the carb not me!
 
  #10  
Old 11-20-2007, 01:24 AM
deej's Avatar
Your Humble Moderator/Admin
1st Gear Member
Join Date: Nov 2005
Location: Washington
Posts: 21,045
Default RE: Running rich? Or running naked?

I was going to post [sm=ttiwwp.gif]but someone beat me to it. And no Mark we are not talking about you.[8D]
 

Thread Tools
Search this Thread
Quick Reply: Running rich? Or running naked?


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.