Vulcan 900's run rich?

Johnny5 · 07-04-2008

I have heard that the 900's run a bit rich. So today after having my bike almost 3 years, I checked the plugs. To me, they look lean. I havent made any modifications to the airbox. Anyway, just thought some of you might want to be careful with adding extra air without fuel support. Maybe my bike isnt the norm, but I thought I'd share my findings.

900classic · 07-04-2008

This is what mine looked like after about 1,000 miles.......I think I was running a little rich.http://i128.photobucket.com/albums/p...arkplug002.jpg

Johnny5 · 07-04-2008

The bottom plug, Im guessing was from the rear jug? Mine was a little darker than the front, but my plug had no tan on the electrode at all. It was all white.

rustydog · 07-05-2008

Did you pull them just after a cold startup or after running awhile? I would clean or replace the plugs, go for a 1/2 hour ride then pull them hot (don't get burned) look at the plugs now to determine normal or rich.

rustydog · 07-05-2008

Did you pull them just after a cold startup or after running awhile? I would clean or replace the plugs, go for a 1/2 hour ride then pull them hot (don't get burned) look at the plugs now to determine normal or rich.

Sorry for the duplicate post. When I logged back on the PC it posted a 2nd time.

900classic · 07-05-2008

I'll have to try that. If I remember right the engine was cold when I pulled the plugs.

900classic · 07-05-2008

Quote:

Originally Posted by Johnny5

The bottom plug, Im guessing was from the rear jug? Mine was a little darker than the front, but my plug had no tan on the electrode at all. It was all white.

If that was the case than I'd definitely say you were running lean.

07-04-2008	#1 (permalink)
Johnny5 Way Too Much Free Time BTK Expert Join Date: Jul 2006 Location: Port Huron, Michigan Posts: 1,281	Vulcan 900's run rich? I have heard that the 900's run a bit rich. So today after having my bike almost 3 years, I checked the plugs. To me, they look lean. I havent made any modifications to the airbox. Anyway, just thought some of you might want to be careful with adding extra air without fuel support. Maybe my bike isnt the norm, but I thought I'd share my findings. __________________ 06 Vulcan 900 Classic in Blue

07-04-2008	#2 (permalink)
900classic Riding daily BTK Expert Join Date: Nov 2007 Location: Orem, Utah Posts: 2,887	This is what mine looked like after about 1,000 miles.......I think I was running a little rich.http://i128.photobucket.com/albums/p...arkplug002.jpg __________________ Jared VN 900classic VROC #26705

07-04-2008	#3 (permalink)
Johnny5 Way Too Much Free Time BTK Expert Join Date: Jul 2006 Location: Port Huron, Michigan Posts: 1,281	The bottom plug, Im guessing was from the rear jug? Mine was a little darker than the front, but my plug had no tan on the electrode at all. It was all white. __________________ 06 Vulcan 900 Classic in Blue

07-05-2008	#6 (permalink)
900classic Riding daily BTK Expert Join Date: Nov 2007 Location: Orem, Utah Posts: 2,887	I'll have to try that. If I remember right the engine was cold when I pulled the plugs. __________________ Jared VN 900classic VROC #26705

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07-05-2008	#4 (permalink)
rustydog Great being back Forum Supporter Join Date: Jul 2008 Location: SW Pa Posts: 50	Did you pull them just after a cold startup or after running awhile? I would clean or replace the plugs, go for a 1/2 hour ride then pull them hot (don't get burned) look at the plugs now to determine normal or rich.

07-05-2008	#5 (permalink)
rustydog Great being back Forum Supporter Join Date: Jul 2008 Location: SW Pa Posts: 50	Did you pull them just after a cold startup or after running awhile? I would clean or replace the plugs, go for a 1/2 hour ride then pull them hot (don't get burned) look at the plugs now to determine normal or rich. Sorry for the duplicate post. When I logged back on the PC it posted a 2nd time.

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