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Main Area => General GS500 Discussion => Topic started by: Tang on July 06, 2008, 06:50:16 PM

Title: Am i running lean?
Post by: Tang on July 06, 2008, 06:50:16 PM
ok my friend pulled my plugs out today and see what its like

and he says its lean cuz the electro thingy is white like ashy white

and i have 150 mains in them with washers on each needle i'm guessing

i dunno cuz buddah did my carbs

but i was wondering is 150s too small

i live at sea level so i don't . :dunno_white:

any help would be great
Title: Re: Am i running lean?
Post by: beRto on July 07, 2008, 06:42:18 PM
Ashy white usually means lean running.

To really answer this question, you will need to post a picture. Otherwise, compare your plugs against this chart:
(http://bbburma.net/Scans/Haynes_SparkPlugChart.jpg)
Title: Re: Am i running lean?
Post by: Tang on July 14, 2008, 08:13:36 AM
Here is the RIGHT plug

(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0552.jpg)
(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0553.jpg)
(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0554.jpg)



Here is the LEFT plug

(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0555.jpg)
(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0556.jpg)
(http://img.photobucket.com/albums/v303/dudegetasony/CIMG0557.jpg)
Title: Re: Am i running lean?
Post by: lamoun on July 14, 2008, 09:47:53 AM
Well.... look at this http://www.dfn.com/benkaren/plugchop.html (http://www.dfn.com/benkaren/plugchop.html) (It's for 2-stroke engines thought)

He says that you should look to the inside, bottom of the plug. I have read it elsewhere too, but cant find it right now.

(http://www.dfn.com/benkaren/Plugs.JPG)
Title: Re: Am i running lean?
Post by: The Buddha on July 14, 2008, 10:01:02 AM
Tang - right is great ... left is a bit leanish - look for vacuum cap and other avenues for air getting in, left has more of that than right. Its prolly just a hair lean. You have idle hovering etc type issues ?
This is after idle ... not at speed with near WFO under good load after steady RPM right ... then dont touch mains, its air screws.
Anyway vacuum leaks first. Check that.
Cool.
Buddha.
Title: Re: Am i running lean?
Post by: Tang on July 14, 2008, 12:19:28 PM
WFO?

my idle is right it idles around 1500RPMS

how do i see if i have vacuum leak?
Title: Re: Am i running lean?
Post by: The Buddha on July 14, 2008, 12:28:51 PM
I was wondering if these were done at idle, or after a wfo run ... during a wfo run, hit the kill swicth and pull over and check ... yes, as bad a s it sounds, that is how to get a wfo reading of the plug.
Vacuum leak - check with spraying wd 40 around the intake manifolds. BTW how old are those ... if they are bad might as well get them swapped.
Cool.
Buddha.
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