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Buell Motorcycle Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » BB&D Archives » Popping and backfiring « Previous Next »

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Clayman
Posted on Wednesday, February 15, 2006 - 08:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I just recently read on another site that popping or backfiring from the exhaust was a sign that the bike is to lean. I am wondering this because mune does this, it always has but since i put a drummer on i hear it loud and clear. Does anybody have an answer to this. Thanks
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Lowflyer
Posted on Wednesday, February 15, 2006 - 09:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine did that when I wired the valve open on my stock can. I wonder if a TPS reset would help.
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Windaddiction
Posted on Wednesday, February 15, 2006 - 10:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

clay mien does it too, I've been told it's no big deal........... However I'm still thinking about getting the techlusions box...Eitehr I buy a dual sport or just put more money into the buell! Dont know what to do
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Brad1445
Posted on Wednesday, February 15, 2006 - 10:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I try to make mine, grab a handfull of throttle then just let go!
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Clayman
Posted on Thursday, February 16, 2006 - 01:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I dont care about the sound, i kinda like it, but if its as a result of being to leen then thats no good
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Windaddiction
Posted on Thursday, February 16, 2006 - 09:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I don't think it's running too lean all I know for me is that my fan runs a lot less now so to me that means all is well?? I think even with the RACE ECM you'd still probally back fire.
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Thunderbox
Posted on Thursday, February 16, 2006 - 09:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have said this before and I guess it needs said again. The fan is there to regulate temperature. If it isn't coming on at all then the bike is not reaching operating temperatures or the fan has malfunctioned. This is not good. The engine needs to be at operating temp to work it's best. Hearing the fan come on is not a bad thing. Why is everyone overly concerned about the fan coming on. You drive your car and the fan comes on and off all the time. It isn't overheating it's regulating the temp where it should be. It's exactly the same with the Uly fan. Let it do it's job and be concerned when it doesn't come on at all not when it's working properly.

(Message edited by thunderbox on February 16, 2006)
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Electraglider_1997
Posted on Thursday, February 16, 2006 - 12:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thunder,
I agree with your statement. If the fan never comes on then problems like condensation buildup will probably be seen on the dip stick. I'll take a properly warmed up engine over acidic oil eating the guts out of my engine any day.
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Thunderbox
Posted on Thursday, February 16, 2006 - 12:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Nice to see someone understands some of the issues with not reaching operating temperatures. Very important to engine longevity to have the oil up to operating temp. I think I need to get an oil temp gauge just to see what it gets to. On the Police motorcycles we have they will see 290F regularly. I think I will look for a set of Oil Temp and charging voltage gauges for the Uly.
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Blake
Posted on Thursday, February 16, 2006 - 01:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thank you Thunder man! You speak the truth.



Popping/backfiring can also be a symptom of leaking exhaust header gaskets, the ones at the header to cylinder head interface.
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Windaddiction
Posted on Thursday, February 16, 2006 - 06:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Let me clarify my fan does come on.... whenever I shut it off it comes on for about a minute hiway driving makes it come on and sitting in traffic makes it come on!
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Clayman
Posted on Thursday, February 16, 2006 - 06:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thats nice ive heard a whole lot about fans but would it be possible to here some more about the actual thread topic
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Windaddiction
Posted on Thursday, February 16, 2006 - 08:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Geez it's okay!! I was told the reason it does that is your headers are hot and when you roll off the throttle fast, some un burnt gas exits the engine and then egnites on the hot headers. If you are really worried call a shop with an air fuel reader and makes sure it's all within spec.
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Lorazepam
Posted on Friday, February 17, 2006 - 08:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

make sure you have the throttle all the way off when decelerating. if you have it cracked open a little it will pop in the exhaust from the small amount of fuel being metered into the cylinder.
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