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General Category >> Rubber Side Down! >> Burning too rich?
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Message started by doc5446 on 04/23/09 at 05:56:26

Title: Burning too rich?
Post by doc5446 on 04/23/09 at 05:56:26

My gas mileage has gone to h3ll and I think it might be burning to rich. What are the telltale signs and how do I fix the problem?

Title: Re: Burning too rich?
Post by bill67 on 04/23/09 at 05:58:50

normally you need spacers in their to get better milage

Title: Re: Burning too rich?
Post by Gort on 04/23/09 at 06:55:10

Have you removed the sparkplug and looked at its color? Is it sooty black? How is its condition? Cruddy...clean...and when did you last change it? How about the airfilter? Does it look dirty...how long has it been in the bike? These are easy first steps to check.

Title: Re: Burning too rich?
Post by PTRider on 04/23/09 at 07:00:11

Have you changed anything, or did something change itself?

As Gort says, learn to read the color of the spark plug.
http://www.verrill.com/moto/sellingguide/sparkplugs/plugcolorchart.htm

With your "stage 1 kit" you can try turning the idle adjustment screw in (clockwise) as far as possible without hurting engine performance. You can try lifting the jet needle less by adding a 3mm washer (about .5mm thick) or two on top of the thin kit spacer, again as much as possible without hurting performance.

Unlike a post-'86 car with a mass airflow sensor and other electronic controls, our motorcycle fuel system is primitive. A dirty air filter element will cause rich operation. If your K&N element looks like a lint blanket, it needs cleaning & re-oiling. A $15 HiFlo brand replacement from a non-Suzuki shop is a good choice if needed for those with a dirty stock air filter.

If you changed anything, retrace your steps; maybe you did something that caused the problem.

Title: Re: Burning too rich?
Post by doc5446 on 04/23/09 at 07:31:02

3 months ago I had the stealership install the SuperTrapp, jet set and KN air filter (I had more money than time). The fuel issue just started maybe a week or 2 ago. I pulled the air filter, it looked good, spark plug is next.

Title: Re: Burning too rich?
Post by verslagen1 on 04/23/09 at 08:12:00

What did you tell them to do?

check your plug, then if out of whack take it back.

aside from that, drop the bowl, see if the jets are in the bowl.

How many disks did they install?

Title: Re: Burning too rich?
Post by doc5446 on 04/23/09 at 08:14:31

http://c1.ac-images.myspacecdn.com/images02/71/l_b04fb5bd9e8841d7b0a2134a9e46b128.jpg
http://c2.ac-images.myspacecdn.com/images02/68/l_ea35c3a01c0244f3acbff1d1842ec181.jpg

Title: Re: Burning too rich?
Post by dasch on 04/23/09 at 09:00:47

Now, that's sooty black! Carbon deposits on the plug = mixture too rich.

Title: Re: Burning too rich?
Post by serowbot on 04/23/09 at 10:05:51

If the condition didn't happen at the time of the jetting change, but after some time, I think there's something else going on.... Check the vac line for presence of gas,.. there should be none..