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Earwiguhuhuh
| Posted on Saturday, March 12, 2011 - 08:10 pm: |
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I bought an 08 Ulysses xb12xt and brought it home today. It has a Drummer installed and on deceleration it pops/backfires. These aren't crazy loud backfires but defiantly pops. I asked this on another forum because this one is jacked up today and got lots of different opinions and replies. I'd like to take the cheapest route to fix this if it is even an issue so I ask... Do I have an issue or are these pops/backfires normal with the Drummer pipe? Would you suggest a Dyno Tune? Erik Buell Racing ECM? TPS Reset? Do they even do TPS rests on 08 Ulys? Thanks for any info/retrogradations any of you have. Also, if anyone is in NJ and wants to fix this for me I'm willing to pay as long as you don't rip me off Thank you. |
Froggy
| Posted on Saturday, March 12, 2011 - 08:22 pm: |
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Popping is normal for a bike running an aftermarket pipe with the stock tune. It will still pop a bit with the stock exhaust, but it is a lot harder to notice. Your best bet is the Erik Buell Racing ECM, they did all the homework and hard work for you, and will transform the way your bike performs. Yes there is still a TPS reset, but it can be quickly done with a special combonation of throttle input while the engine isn't running. No need for external software or a computer |
Earwiguhuhuh
| Posted on Saturday, March 12, 2011 - 08:51 pm: |
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Froggy, thanks for the reply. A couple more questions if you don't mind. Is the popping bad for the bike? It isn't obnoxious and I actually like how it sounds but I don't want to harm anything. Also, will I need to perform a TPS reset after I install the Erik Buell Racing ECM? Do you have the instructions on how to do this? Thanks again. |
Froggy
| Posted on Saturday, March 12, 2011 - 09:18 pm: |
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Not required as the bike automagicly does it every so often, but it can't hurt to do.
quote:1. Turn on the key. 2. Set the kill switch to the run position. 3. Don't start the engine. Rotate the throttle from fully closed (gently held closed) to fully open (gently held open), and then back again to closed (gently held closed). 4. Repeat 3 times. Hold at each stop (fully open, fully closed) for 1 full second. 5. Turn the key off and back on.
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Earwiguhuhuh
| Posted on Saturday, March 12, 2011 - 09:29 pm: |
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Froggy, thanks again, this really helps. I'm going to do a TPS reset tomorrow morning just for the hell of it. I hate to ask the same question again, but is decel popping bad for the bike? Not loud crazy backfires... but pops on deceleration/engine breaking. TY! |
Hughlysses
| Posted on Saturday, March 12, 2011 - 09:30 pm: |
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Minor backfiring like that won't hurt anything. My 1983 Honda Ascot was jetted lean from the factory to meet emissions regs and backfires like that on deceleration. I've read that what happens is the mixture is too lean to fire, so unburned fuel/air mixture accumulates in the exhaust until there's enough fuel to be ignited and you get a "pop". You aren't going to burn valves or anything like that. |
Anonymous
| Posted on Saturday, March 12, 2011 - 10:57 pm: |
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Could be loose header stud nuts or flange gasket.Check for exhaust leaks. |
earwig
| Posted on Sunday, March 13, 2011 - 07:05 am: |
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Any tips or tricks for checking for leaks? Aside from aside from making sure all the bolts are tight? |
WasAesquire
| Posted on Sunday, March 13, 2011 - 10:52 am: |
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While exhaust pops won't hurt the engine itself, it may eventually loosen or damage the exhaust system. Hughlysses explanation might be right, but my experience is that you have unburned fuel in the exhaust that ignites on a later exhaust flame front. Aftermarket cans don't have the same pressure wave characteristics as stock.....that's why they may give more power and are louder. Stock systems are tuned for minimum noise at a certain rpm and to stuff unburned fuel vapor back in the cylinder for pollution control. It's a balance of cams, heads, FI, Spark, intake & exhaust. Also, could be an air leak as Anonymous says. |
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