SuzukiSavage.com - backfiring...not what you'd think.

BurnPgh

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backfiring...not what you'd think.
10/08/10 at 22:33:28

Last few days I'll get a nice solid pop when I start it up. My shutdown backfiring is essentially cured excepting extreme changes in temp from day to night (open air filter). Any ideas? Idles just like always. Run's just fine. No loss of power, no stuttering, no smells or smoke etc etc. Everythings normal except for the start up.

I DID just clean and re-oil my KN filter. Maybe went overboard with the oil?

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cornfuzed Senior Member Offline SuzukiSavage.com Rocks! Posts: 269 grinnin from coast to coast Gender:	Re: backfiring...not what you'd think. Reply #1 - 10/09/10 at 07:41:03 when i was playing with jetting and the air curcit, i would get that issue when my idle was off either high / low... could it be the petcoc ?
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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: backfiring...not what you'd think. Reply #2 - 10/09/10 at 07:49:55 Pop on startup ?? Seems like thats a new one..... to me anyway.
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28644 Tucson Az Gender:	Re: backfiring...not what you'd think. Reply #3 - 10/09/10 at 08:45:06 I think you might have over-oiled... wash it out and try again...
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: backfiring...not what you'd think. Reply #4 - 10/09/10 at 09:07:27 I get a pop on startup every so often. stock filter, stock 88 carb won't start if I touch the throttle. on the '96 if it didn't start on the second rev I could open the throttle a little and it would start.
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B1-66er Full Member Offline I've been everything you want to be. Posts: 124 Eastern Ohio Gender:	Re: backfiring...not what you'd think. Reply #5 - 10/09/10 at 15:06:18 How did you cure the shut-off backfiring? I have that problem, but only after it's bee b ridden, not after only idling.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: backfiring...not what you'd think. Reply #6 - 10/09/10 at 15:24:34 B1-66er wrote on 10/09/10 at 15:06:18: How did you cure the shut-off backfiring? I have that problem, but only after it's bee b ridden, not after only idling. You got your idle mixture a little bit lean. turn the screw about an 1/8 turn CCW or till it poofs on shut off.
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B1-66er Full Member Offline I've been everything you want to be. Posts: 124 Eastern Ohio Gender:	Re: backfiring...not what you'd think. Reply #7 - 10/09/10 at 15:31:25 It smells like it's running rich. However, I have zero motorcycle experience, just cars. Do bikes naturally smell richer than cars?
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verslagen1

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Re: backfiring...not what you'd think.
Reply #8 - 10/09/10 at 16:26:12

In order to "afterfire", there has to be fuel (rich smell), some oxygen (fresh air) and an ignition source (hot pipe).

The last two are easy to come by even after a short ride. Fuel has to go thru a gantlet to accumulate in the muf. A lean adjustment makes this easy as when the engine misfires due to insufficient fuel mixture it passes thru and collects in the muf.

naturally an overly rich idle mixture will do the same thing.

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Boofer

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Re: backfiring...not what you'd think.
Reply #9 - 10/09/10 at 17:02:11

I may be WAAAY wrong, but this is my second Fall with the Savage. Been through one winter. Our humidity is low and temps are 50 morning 82 daily. I have noticed a start up pop ocassionally. I also have a little more trouble with the petcock in winter riding. (40 Degrees) I just ignore most symptoms unless they seem life threatening to my engine. I am also showing signs of wear and get the grumble pops on waking up in the morning. Some of these "problems" described may be weather or temp related. We have to tune our engines for optimal riding in all weather. When weather changes our bikes are slightly out of tune.???

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cornfuzed

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Re: backfiring...not what you'd think.
Reply #10 - 10/09/10 at 22:29:34

Boofer wrote on 10/09/10 at 17:02:11:

I may be WAAAY wrong, but this is my second Fall with the Savage. Been through one winter. Our humidity is low and temps are 50 morning 82 daily. I have noticed a start up pop ocassionally. I also have a little more trouble with the petcock in winter riding. (40 Degrees) I just ignore most symptoms unless they seem life threatening to my engine. I am also showing signs of wear and get the grumble pops on waking up in the morning. Some of these "problems" described may be weather or temp related. We have to tune our engines for optimal riding in all weather. When weather changes our bikes are slightly out of tune.???

Heeyyy i get the grumble pops when i wake up too! im probably running a little rich these days or maybe my air circuit is running a foul... lest thats what the misses tellls me ....

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cursal Full Member Offline Daily Savage Rider Posts: 175 Eugene, OR Gender:	Re: backfiring...not what you'd think. Reply #11 - 10/10/10 at 08:17:33 mmmmmmmmmmm....I head for Grumble Pops when i wake up Sounds like commercial for a bikers breakfast cereal
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: backfiring...not what you'd think. Reply #12 - 10/10/10 at 10:06:27 mmmmmmmmmmmmm... Grumble pops! Looks like red corn pops... taste like Klotz with a racy smell... pops like an old harley... guaranteed to keep you running.
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prechermike

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Re: backfiring...not what you'd think.
Reply #13 - 10/10/10 at 12:09:57

Back to BurnPgh's original thougth.

I have noticed mine doing the same thing a few times when I started it first thing. I have not done anything to the bike lately, my thoughts were it had to do with the changes in humidity, temp and so forth. i was relly hoping someone would have come up with something.

I don't think it is hurting anything, at least not that I can notice.

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bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: backfiring...not what you'd think. Reply #14 - 10/10/10 at 12:41:50 You can get moisture in your tank from the change of weather,Sea Foam gets that out.
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