Poping on deceleration how much is to much

cdogg556

cdogg556

Guru
Kobi said:
I'm running a stock motor with V&H 2-1. Setting the idle mixture screw to best idle(1 turn out) it pops on decal. If I richen it 1/8-1/4 out on the idle mixture screw, the popping is almost gone. Plugs look nice. Running 33/78 jets with stock air bleed. I had Mean Mothers on the bike last year and the popping was pretty much the same. Once in a while when I start it HOT, it pops real loud out the exhaust, like a shotgun blast.
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That is the same jetting that I am running with a 585 cam and Vance and Hines 2 into 2 exhaust with original baffles cut in half and thunder city baffles in front of the stock baffles, plugs look good, still a bit rich but in my opinion a little rich is better than too lean and I can't stand popping at all, just my personal preference, and it runs the best it ever has, flat out hauls ass!:whoop::whoop::whoop::chopper::old2:
 
Th3InfamousI

Th3InfamousI

Administrator
Staff member
Kobi said:
I'm running a stock motor with V&H 2-1. Setting the idle mixture screw to best idle(1 turn out) it pops on decal. If I richen it 1/8-1/4 out on the idle mixture screw, the popping is almost gone. Plugs look nice. Running 33/78 jets with stock air bleed. I had Mean Mothers on the bike last year and the popping was pretty much the same. Once in a while when I start it HOT, it pops real loud out the exhaust, like a shotgun blast.
Click to expand...
cdogg556 said:
That is the same jetting that I am running with a 585 cam and Vance and Hines 2 into 2 exhaust with original baffles cut in half and thunder city baffles in front of the stock baffles, plugs look good, still a bit rich but in my opinion a little rich is better than too lean and I can't stand popping at all, just my personal preference, and it runs the best it ever has, flat out hauls ass!:whoop::whoop::whoop::chopper::old2:
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33 ! Geeze guys you like em fat!

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Kobi

Kobi

Member
Runs Good and plugs look nice. At one turn out on the idle mixture screw, I may be a tad rich according to S&S tuning. Maybe 32 would get me to 1-1/4 turns out. I run another 1/8 to 1/4 (richer) out if I want to stop the decal popping. Seems 33 works fine, dropping to a 32 or 31 would not be worth the trouble...
 
Th3InfamousI

Th3InfamousI

Administrator
Staff member
Kobi said:
Runs Good and plugs look nice. At one turn out on the idle mixture screw, I may be a tad rich according to S&S tuning. Maybe 32 would get me to 1-1/4 turns out. I run another 1/8 to 1/4 (richer) out if I want to stop the decal popping. Seems 33 works fine, dropping to a 32 or 31 would not be worth the trouble...
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I'm guessing you are begging for a gas station at 100 miles?

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BWG56

BWG56

Guru
Kobi said:
Runs Good and plugs look nice. At one turn out on the idle mixture screw, I may be a tad rich according to S&S tuning. Maybe 32 would get me to 1-1/4 turns out. I run another 1/8 to 1/4 (richer) out if I want to stop the decal popping. Seems 33 works fine, dropping to a 32 or 31 would not be worth the trouble...
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I was running 32 and 78 and getting sneezing thru the carb running 2-2500 rpm while cruising, according to S&S carb set up they recommended bumping up intermediate, I'm also running 33 and 78 now with the timing set at 30* and haven't heard the sneeze once in the last 1K miles. I don't care about gas mileage cause my ass needs off the bike by 75 miles anyway, but I am getting 32MPG.
But I also have the S&S dual runner, 585 cam and VH 2into2
I think the differences are in the tolerance's of the motors and the carbs. I mean when you think about it there's only .001 between a 32 and a 33.
 
Kobi

Kobi

Member
I hate to mess with a good thing!! Runs too good. I do get a little lean surge at low speeds. Seems to be better when I add the 1/8 to 1/4 rich(from 1 turn, best idle) on the idle mixture screw. No black smoke. Plugs look nice. I have thought about dropping to 32 but if all it does is allow my mixture screw to be set around 1.25 turns(best idle per S&S tuning) out, what's the point?? It had 29.5/74 when I bought it. It came from Salt Lake, only 1100 miles on it. It had 29.5/74 jets in it a spike air cleaner and Mean Mothers. Ran like crap when I brought it to Missouri. I guessed it ran fine in the thin air of Utah with that set up? The fuel mileage does not seem too bad. I really don't pay much attention. All I can say is this thing flat get's with it. Pulls much harder with V&H 2-1, than the Mean Mothers. I assume it had the stock cam in it, but maybe not!
 
Srodden

Srodden

Well-Known Member
jska2636 said:
My 2004 chopper has a 117..i dont mind the poping just making sure its common with these bikes...my 4 stroke dirtbikes pop on deceleration and its no big deal just much loader on the 117 haha
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I have v&h 2 into 2. I removed the baffles and installed thunder monster baffles 6 inches up in pipes. I have almost zero decel pop and have a nice decel growl instead. When I group ride I have a lot of pops on decel but that's group riding much different from solo riding. Hope that helps shed more light.
 
Hirter6Pack

Hirter6Pack

Not Quite A Guru
Srodden said:
I have v&h 2 into 2. I removed the baffles and installed thunder monster baffles 6 inches up in pipes. I have almost zero decel pop and have a nice decel growl instead. When I group ride I have a lot of pops on decel but that's group riding much different from solo riding. Hope that helps shed more light.
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I'm sorry but can you explain group riding. Is it because of the rubber banding?
 
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