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Why don't newer big twins have the potato sound?

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  #111  
Old 01-26-2011, 04:02 PM
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Originally Posted by dragpipe
sweet
 
  #112  
Old 01-26-2011, 04:59 PM
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Originally Posted by tandt
I don't have a lot of experience with BT's (I ride a Nightster) but I am looking at Fatboys lately. I was surprised by the exhaust note of the stock (2007) model - the valve noise was almost louder than the pipes. I later checked out a 2008 with V&H longshots, which was loud, but lacked what I would consider the classic Harley potato sound. What mods do folks do to get a great sound?
The potatoe sound was a product of the single cam big twins that were non efi. Twin Cam changed the geometry of the valve train and the overlap - duration.
 
  #113  
Old 01-26-2011, 05:08 PM
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Originally Posted by EHLTB66
Buy a Shovelhead.
+1 Stock Shovelheads have the primo potato sound.
 
  #114  
Old 01-26-2011, 06:39 PM
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Originally Posted by wideglidebob
you need to buy a older carb bike, now there smoged out with fuel injected, find yourself a 05 or later i believe o5 was last yr for carbed bikes
Not entirely... I had an 04 dresser and currently have an 05... both of which had fuel injection.
 
  #115  
Old 01-26-2011, 07:30 PM
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And my '05 Heritage is carbed...but no potatoe.
Once in a rare while it will say, "cough, gasp,miss, rope-a-dope rope-a-dope rope-a-dope" then goes back to the usual "chumminachumminablug chumminachumminachumblugblugchumminablug"...and so forth. You gotta love the occasional "BLOOOP" they do when starting too.
 

Last edited by Quadancer; 01-26-2011 at 07:35 PM.
  #116  
Old 01-26-2011, 09:27 PM
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Originally Posted by coupe55
Put a balloon on your spokes like you did on your bike when you were a kid! When you go real slow it is almost like the potato, potato sound...
Nah.. the balloon gives you the lub lub lub.....playing cards and clothespins will give you the potato potato...
 
  #117  
Old 01-27-2011, 12:20 PM
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Originally Posted by Quadancer
And my '05 Heritage is carbed...but no potatoe.
Once in a rare while it will say, "cough, gasp,miss, rope-a-dope rope-a-dope rope-a-dope" then goes back to the usual "chumminachumminablug chumminachumminachumblugblugchumminablug"...and so forth. You gotta love the occasional "BLOOOP" they do when starting too.

Kinda sounds like us on a few of the harder morning afters doesn't it ?
 
  #118  
Old 01-27-2011, 12:49 PM
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Originally Posted by TwiZted Biker
Kinda sounds like us on a few of the harder morning afters doesn't it ?
I never did get the potato thing...mine sounded more like a cement mixer..putt putt......putt.......putt putt......
 
  #119  
Old 01-27-2011, 03:46 PM
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I've always thought it was more of a 2 cylinder John Deere sound myself as opposed to a potato

http://www.youtube.com/watch?v=jO6rT61H3RM
 
  #120  
Old 01-27-2011, 03:54 PM
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fuel inj smooths out the lope....cam lobe separation defines it as well....bc of the epa, neither are now conducive to the old harley sound...like say a carbed shovel....to fix it, chunk the injection, change cams, & give it some compression
 


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