backfiring - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 13 (permalink) Old 09-04-2009, 08:57 AM Thread Starter
 
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backfiring

my bike has started backfiring through the engine. Is this cause for alarm or just normal for the 900? just does it in the 1st 5 min after i start it and then not all the time. what causes this?
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post #2 of 13 (permalink) Old 09-04-2009, 11:13 AM
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Originally Posted by erniescott20 View Post
my bike has started backfiring through the engine. Is this cause for alarm or just normal for the 900? just does it in the 1st 5 min after i start it and then not all the time. what causes this?
Hi erniescott20, what exactly do you mean through the engine? Do you mean through the air cleaner or is it coming from the exhaust? What octane do you use? How old is your bike? Anyway, first thing I would do is run Seafoam through to clean out any build up on your valves and clean up your fuel system. Seafoam works wonders, you may have to run it through a couple of times. There are some other things to check but that would be my first try unless you have other symptoms to share

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post #3 of 13 (permalink) Old 09-04-2009, 08:18 PM Thread Starter
 
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through the air cleaner. it is a 2008 model and just turned over 4000 miles. i was tryin 86 octane should i go to mid grade it has only done it a couple times(the backfiring) i will try that seafoam.
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post #4 of 13 (permalink) Old 09-05-2009, 02:06 AM
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through the air cleaner. it is a 2008 model and just turned over 4000 miles. i was tryin 86 octane should i go to mid grade it has only done it a couple times(the backfiring) i will try that seafoam.
Actually you can run whatever grade you want, just as long as you run seafoam through it periodically. That's been my experience anyway. Usually the backfiring problem is from guys running only premium and no seafoam. Is it backfiring when decelerating or accelerating?

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post #5 of 13 (permalink) Old 09-05-2009, 09:01 AM Thread Starter
 
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just when i 1st start it and goose it
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post #6 of 13 (permalink) Old 09-05-2009, 09:08 AM
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Try raising the idle speed a little and see if that helps.

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post #7 of 13 (permalink) Old 09-05-2009, 11:01 AM
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just when i 1st start it and goose it
I know that a little backfiring when it's cold started is normal, as long as it goes away. Usually it's on deceleration (when you let off of the throttle).

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post #8 of 13 (permalink) Old 09-05-2009, 01:32 PM Thread Starter
 
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ok thanks guys much appreciate ur info thank u
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post #9 of 13 (permalink) Old 09-05-2009, 02:40 PM
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OK, I'll show my ignorance, what the heck is Seafoam and where do you get it? I've only run high octane in my 900 and have not been too concerned about an occasional back pop, but my bike only has 2500 miles on it. ;{
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post #10 of 13 (permalink) Old 09-05-2009, 03:26 PM
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OK, I'll show my ignorance, what the heck is Seafoam and where do you get it? I've only run high octane in my 900 and have not been too concerned about an occasional back pop, but my bike only has 2500 miles on it. ;{
Google it. It's a carb cleaner, fuel stabilizer, prevents constipation, cures headaches, and makes your hair grow back if you're losin' it. Personally, I've never seen it in an auto parts store and I wouldn't buy it, I'd rather use Gumout or STP fuel injector cleaner. Just don't use a lot in a motorcycle tank. Most bottles of FI cleaners are meant to go into 20-25 gallons of gas.

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