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Old 02-23-2008, 06:00 PM   #1
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backfire?

i just changed my oil then went and got my chain tightened and waxed, as im coming home from riding, i noticed that when i down shift in 2 nd gear i hear a poping noise from under the gas tank, anyone ele ever had this problem? feels like a misfire, i dunno help please! maybe even thought bad quality gas? i did a search and only thing came up was geezers battery threaad when his bike died
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Old 02-23-2008, 06:13 PM   #2
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found this on svportal what the does lean low RPM fuel mapping for emmisions. mean?
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Old 02-23-2008, 06:19 PM   #3
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Backfire through the head gasket??
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Old 02-23-2008, 06:29 PM   #4
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man im not sure where it coming from airbox? sound like its right under the tank
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Old 02-23-2008, 06:42 PM   #5
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lean pop from the carbs. They are jetted pretty lean from the factory so if you got some so so gas it can cause a little pop back thru the carbs. Could also be out of sync slightly.
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Old 02-23-2008, 06:43 PM   #6
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This used to always happen on my TL1000
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Old 02-23-2008, 06:44 PM   #7
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carb? my bike is fuel injected, im confused still
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Old 02-23-2008, 08:06 PM   #8
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How much oil did you put in it?
The SV only holds a little over 2.5 quarts with a filter change.
If it's overfull it may cause your issue.
If you can't figure it out before Tuesday, bring it by and we'l look at it, no charge.
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Old 02-23-2008, 09:49 PM   #9
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man id say around 3.5 quarts, thats what a suzuki dealer told me so i bought enough oil and when i added it i turned it on around 2.5 quarts and shut it off so i could get it to drip down, into the level maybe i need to drain a bit, thanks patrick
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Old 02-23-2008, 10:20 PM   #10
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+1 to Patrick's comments, I've done that on my old first gen before and had the same issue.
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Old 02-23-2008, 10:26 PM   #11
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^^ sound like the tank is poping up?
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Old 02-23-2008, 10:44 PM   #12
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Hold on, SV1000 or SV650?

1000 is 3.5 quart or so, the 650 is 2.5, which do you have?
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Old 02-23-2008, 10:54 PM   #13
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sv1000 good thinkin scott, was about to drain some oil in the am, i was certain i didnt over fill it
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Old 02-23-2008, 10:59 PM   #14
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O.K., double check the throttle bodies and see if they're fully seated in the boots.
I've seen SV's backfire bach through the throttle bodies and pop them out of the boot partially causing a vacuum leak.
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Old 02-23-2008, 11:02 PM   #15
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Quote:
Originally Posted by Patrick View Post
O.K., double check the throttle bodies and see if they're fully seated in the boots.
I've seen SV's backfire bach through the throttle bodies and pop them out of the boot partially causing a vacuum leak.
thats exactly what it sounds like! man i dont know how to do this, should it be ok to ride to your shop?
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Old 02-23-2008, 11:10 PM   #16
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Probably not, that's a pretty big vacuum leak IF that's what's wrong.
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