Yamaha Discussions about Yamaha ATVs.

Why is my bike running so lean

Thread Tools
 
Search this Thread
 
  #1  
Old 10-25-2005, 04:07 PM
thedieselkid's Avatar
Range Rover
Thread Starter
Join Date: Sep 2005
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

My mods are in my sig, and my jetting is 195 and 200 on the mains, and 27.5 pilots. I thought the bike was running lean so I took it to the dealership, and they put a probe in the exhaust to find out what the air fuel is, and they told me that it was running lean. I had them tinker with the carbs to try and richen it up some, but it is still a little on the lean side. Any ideas on what needs to be done to fix this problem. Thanks
 
  #2  
Old 10-25-2005, 04:21 PM
Bradracer18's Avatar
Extreme Pro Rider
Join Date: Sep 2003
Posts: 3,160
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

Where is it lean at(idle, midrange, or wot)???? This will help out a bit more......oh, and where do you live(temperature)??
 
  #3  
Old 10-25-2005, 04:23 PM
wildcatkit52's Avatar
Range Rover
Join Date: Aug 2004
Location: Russellville, AR
Posts: 126
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

stock carbs?
 
  #4  
Old 10-25-2005, 04:29 PM
thedieselkid's Avatar
Range Rover
Thread Starter
Join Date: Sep 2005
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

running lean just at wot. Looks like my next mod is going to somethin to get more fuel Maby a set of 35 mm FCR carbs or kms fuel injection.
 
  #5  
Old 10-25-2005, 04:31 PM
maddog56's Avatar
Elite Pro Rider
Join Date: Sep 2002
Posts: 9,380
Likes: 0
Received 1 Like on 1 Post
Default Why is my bike running so lean

What needles are you running, and at what adjustment? There are plenty of people running similar setups to yours and even bigger ones on stock carbs.
 
  #6  
Old 10-25-2005, 04:44 PM
thedieselkid's Avatar
Range Rover
Thread Starter
Join Date: Sep 2005
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

stock needles in the middle clip Maby my carbs have something wrong with them.
 
  #7  
Old 10-25-2005, 04:51 PM
motox26's Avatar
Shed Knocker Rider
Harley Punk!
Join Date: Oct 2003
Posts: 35,876
Likes: 0
Received 2 Likes on 2 Posts
Default Why is my bike running so lean

Originally posted by: thedieselkid
stock needles in the middle clip Maby my carbs have something wrong with them.
You should be able to use stock carbs and make your bike run fine. Try moving the clip on the needle, that will richen it up.
 
  #8  
Old 10-25-2005, 04:55 PM
maddog56's Avatar
Elite Pro Rider
Join Date: Sep 2002
Posts: 9,380
Likes: 0
Received 1 Like on 1 Post
Default Why is my bike running so lean

Well you should have aftermarket needles, either dynojet or gytr depending on what mains you're running. But that is your problem, your needles need to be on the 4th or probably even 5th clip (from top to bottom).
 
  #9  
Old 10-25-2005, 11:02 PM
thedieselkid's Avatar
Range Rover
Thread Starter
Join Date: Sep 2005
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default Why is my bike running so lean

i have a set of gytr needles I will put those in and see if it helps. Someone suggested using my stock needles so I did, but I will try the GYTR needles and lift them up some and see if it helps at all.
 
  #10  
Old 10-26-2005, 01:45 AM
maddog56's Avatar
Elite Pro Rider
Join Date: Sep 2002
Posts: 9,380
Likes: 0
Received 1 Like on 1 Post
Default Why is my bike running so lean

Try the gytr needles on the 3rd and 4th clips, one of those should fix your problem. If not, we're here.[img]i/expressions/face-icon-small-smile.gif[/img]
 


Quick Reply: Why is my bike running so lean



All times are GMT -5. The time now is 07:02 PM.


Top

© 2024 MH Sub I, LLC dba Internet Brands

Follow Us        



When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.