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Running Rich after new Plugs and Air Filter
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Running Rich after new Plugs and Air Filter - January 9, 2007, 10:01 AM

Hey everyone, I'm stumped and need some ideas.

I changed my plugs and air filter this past weekend. This morning the bike did not feel right (not smooth on accel or decel - felt like I picked up a few extra foot-pounds of torque). I'm pretty sure it is running rich (I put my hand in front of the exhaust and can smell the gas on it now).


Right after changing the plugs and filter, when I first started it up the idle dropped from 1300 to about 700. This is probably due to a lack of air flow right?

Has anyone ever seen an air filter make the bike go rich? I ordered the filter from ron ayers and am fairly certain it is the exact same filter.

Also, when syncing the throttle bodies after changing the plugs, the vacuum on one cylinder was very low. I thought it would have been a sparking problem, so I pulled the new plug back out (already black) and put the old plug back in (brown). No difference. I didn't check the other plugs, again - they might have been black as well from the lack of air.


Any ideas? Thanks.
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January 9, 2007, 10:06 AM

Check all of your ram air lines. Even the litle ones that go to your TBs


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January 9, 2007, 10:22 AM

Quote:
Originally Posted by DRAGULA
Check all of your ram air lines. Even the litle ones that go to your TBs
All lines are clear. I did sync the throttle bodies while I was at it (but this was after it was running poorly). All vacuum lines were connected correctly.

Could the new filter be obstructing air somehow?
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January 9, 2007, 10:41 AM

sounds like a dead cylinder. When it's cold, fire it up and let it run for about 10-15 seconds. Shut it off. Grab each header pipe and see if one feels cool. If one is cool, that's the dead cylinder. Sounds like you are running on 3


check plug and wire connection


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January 9, 2007, 10:45 AM

PLease don't grab the pipes use an spray bottle with water and you can check them about 1 min after starting. I use to use ice cubes also.


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January 9, 2007, 10:46 AM

Quote:
Originally Posted by Scot
sounds like a dead cylinder. When it's cold, fire it up and let it run for about 10-15 seconds. Shut it off. Grab each header pipe and see if one feels cool. If one is cool, that's the dead cylinder. Sounds like you are running on 3


check plug and wire connection
I would have never thought to do that, but it sounds dead on. Did you gap the plugs yourself or did they come pre-gapped? Do what Scot says, sounds like a plug isnt firing.


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January 9, 2007, 10:46 AM

Quote:
Originally Posted by Scot
sounds like a dead cylinder. When it's cold, fire it up and let it run for about 10-15 seconds. Shut it off. Grab each header pipe and see if one feels cool. If one is cool, that's the dead cylinder. Sounds like you are running on 3


check plug and wire connection
All 4 cylinders were hot. When syncing the TBs, cylinder #3 wasn't dead but the vacuum was only half of what the other cylinders where. Could this be an intermittent spark problem? I pulled the plug out with the coil and it was sparking fine. I didn't use dielectric grease on the plugs before pulling the coil on, should I have?

Thanks again.
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January 9, 2007, 10:48 AM

Quote:
Originally Posted by dodge131
PLease don't grab the pipes use an spray bottle with water and you can check them about 1 min after starting. I use to use ice cubes also.
My hands are leather.

Just kidding, I use the *lick finger* method. Never had a problem with it.

Quote:
Originally Posted by gixrben
I would have never thought to do that, but it sounds dead on. Did you gap the plugs yourself or did they come pre-gapped? Do what Scot says, sounds like a plug isnt firing.
They came pre-gaped, I verified that they were correct (0.030").
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January 9, 2007, 10:57 AM

u could get a honda or yamaha and not have to worry about problems like this......
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January 9, 2007, 10:59 AM

Quote:
Originally Posted by JWZelibor
u could get a honda or yamaha and not have to worry about problems like this......
That honda or yamaha would still have this clutz working on it. So yeah, yeah I would.
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January 9, 2007, 11:03 AM

^ fru LOL
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January 9, 2007, 11:03 AM

Quote:
Originally Posted by Ninja636
That honda or yamaha would still have this clutz working on it. So yeah, yeah I would.
See ... I knew I didn't need to make the comment .... you already knew!!! Gold star for you!!


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January 9, 2007, 11:04 AM

Quote:
Originally Posted by JohnnySpeed954
See ... I knew I didn't need to make the comment .... you already knew!!! Gold star for you!!
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January 9, 2007, 01:44 PM

10-15 seconds the pipes don't get hot enough to burn you.


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January 9, 2007, 01:48 PM

Quote:
Originally Posted by Scot
10-15 seconds the pipes don't get hot enough to burn you.
Exactly.

But like I said before, after my 45 minute commute all pipes were sizzling. I really don't think it is a cylinder not firing (because the plug was black when I pulled it out after running for only a few minutes this weekend, a plug wouldn't get black without firing). Do you guys still think that it could be a dead cylinder?
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