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Slight Pop on Shift (Read 86 times)

Wake51

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Murphy's Law

Posts: 214
St. Louis
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Slight Pop on Shift
05/14/12 at 23:57:45

I wanted a 2nd oppinion on my tuning. I know it's near impossible to illiminate the burps and brips from any bike more or less our beloved thumper.

I'm running an HD Dyna muffler and K&N Cone on the carb jetted at 55 w/ bleed holes pilot 152.5 main & 2 turns out. I have a very slight leak at the muffler exhaust joint that I've been unsuccesful at removing even with the tin can method and a bit more packed in there. I know a few decided to run with a slight leak.

When I ring the engine out a bit (not WOT) I will occasionally get a pop when shifting through 1-3. Don't get it 4-5. Do others get this pop? It's very mellow. I don't get it when de acceling or reving. Just on the occasional shift. It seems to scale with the rising temperature of the day.

As of now I just wrote it off as a side effect of the exhaust leak that I'm unable to fix at my current skill level. Was just wondering if anyone else got this running the same set up.

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Routy

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SuzukiSavage.com
Rocks!

Posts: 2280
Winston Oregon
Gender: male

Re: Slight Pop on Shift
Reply #1 - 05/15/12 at 05:43:53

I would think everyone could have that running any setup. These bike are known for doing it all,...... doing everything unpredictable as far as pops, rattles, and afterfiring. Many here have given the false asumption that all the backfiring can be elliminated. And many times it can be, but,.....probably only till the next time out, or the next temperature change, or the next tank of gas, or the next change in elevation, or even something as serious as not holding your mouth right !
If mine ever quits popping, rattling, backfiring, afterfiring, or any......or all of the above ......whatever...., I'll know I have a problem.
And tuning a bike to get rid of backfire is just plain wrong !
Every engine should be tuned to run correctly,.....and effeciently at all speeds.....including idle.
Many a carb has been hacked (ruined?) from tuning to backfire.

Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Slight Pop on Shift Reply #2 - 05/15/12 at 06:00:33 A little burble or pop at shift is no biggee,, not that handy in a hospital zone, I like the noises this big single makes, even the grumblings on decel & pops between gears,
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AlphaBarney Full Member Offline Were you born to resist, or be abused? Posts: 121 Raleigh, NC Gender:	Re: Slight Pop on Shift Reply #3 - 05/15/12 at 14:56:09 Have that same exact issue. Don't let it bother me though. If anything it keeps the cars aware I'm next to them, or passing them that is. Like Routy said above a carb should be tuned to run well. No choke on start, idles well, and runs well under throttle. I'll take that over a couple pops occasionally.
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Realbtl YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 23 Bigfork MT	Re: Slight Pop on Shift Reply #4 - 05/15/12 at 15:37:59 This is reassuring to know. I just put a Dyna on my bone stock 07 and noticed the same thing, slight pop/rasp on shifting. No decel backfire to speak of, occasional fart/pop on shut down. I'm at a bit over 3000' and I think I'll get by w/o re-jetting.
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