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ignition problem ??

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Old Dec 6, 2007 | 09:16 PM
  #11  
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ScooterHD69
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From: Warner Robins, Ga
Default RE: ignition problem ??

ORIGINAL: riggermortis

the carb is clean. 100% for sure. carb cleaner gushed from every port. blew it all out with air, put it back together, minus the air filter, drove it up the street ran great! came home installed the air filter,ran terrible! air filter looks fine, cleaned it anyway, it was a little dirty but not too bad, started it without the air filter again runs great. put the clean air filter on, runs terrible. that is a new one on me. because a few weeks ago it ran fine with the dirty air filter, and now it dont want to run with the clean one. is this something wrong with the carb?
Good question there. It's getting more air without the filter and runs fine. With the air filter installed it is running bad. Sounds like the filter is restricting it or the carb is just running rich to start with. I'm not real up on the Keihin carbs. Are you sure when you put the filter housing on that you aren't somehow engaging the choke? Are you sure that the filter is clean, have you tried a new one?
Something seems to be making it run rich with the air filter on, but it's kind of hard to diagnose on the net. I think we might be getting close though.

Scooter
 
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Old Dec 6, 2007 | 09:23 PM
  #12  
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riggermortis
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Default RE: ignition problem ??

ya im sure the filter is clean cleaned it with gas then read the book and cleaned it with soap and hot water. dried it with a towel and the compressed air. the choke cable was removed before i got the bike so it is just the cam on the carb. i tried it with the backing plate on and the air filter off and it runs good, so for some reason it is just the element.
 
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Old Dec 6, 2007 | 09:27 PM
  #13  
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ScooterHD69
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From: Warner Robins, Ga
Default RE: ignition problem ??

ORIGINAL: riggermortis

ya im sure the filter is clean cleaned it with gas then read the book and cleaned it with soap and hot water. dried it with a towel and the compressed air. the choke cable was removed before i got the bike so it is just the cam on the carb. i tried it with the backing plate on and the air filter off and it runs good, so for some reason it is just the element.
What kind of filter element is it? Maybe cleaning it with gas fubared it or something.
I'm running out of suggestions.

Scooter
 
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Old Dec 6, 2007 | 09:34 PM
  #14  
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Default RE: ignition problem ??

its the stock foam filter, and it seems to be fine. the only thing i can think is that for some reason it is creating too much vacume and drawing fuel from somewhere it is not suposed to.
 
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Old Dec 6, 2007 | 09:39 PM
  #15  
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Default RE: ignition problem ??

the thing that baffels me is that it started all of the sudden. while i was rideing ran good stoped at a light and then ran s#!tty, just like that.
 
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Old Dec 6, 2007 | 09:41 PM
  #16  
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ScooterHD69
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From: Warner Robins, Ga
Default RE: ignition problem ??

ORIGINAL: riggermortis

its the stock foam filter, and it seems to be fine. the only thing i can think is that for some reason it is creating too much vacume and drawing fuel from somewhere it is not suposed to.
Is it the type of filter with the paper or gause with the foam deal wrapped around it. Also back to washing it in gas the foam may not have liked that. Might have melted some of the foam cells shut.
The foam wrapper on my S&S carb filter got hard and clogged my inner paper element.
Does it smell rich with the filter on (kind of burn your eyes with it idling)?

I'm sort of just grabbing at straws now, as a free flowing filter shouldn't make much difference.

Scooter
 
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Old Dec 6, 2007 | 09:42 PM
  #17  
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ScooterHD69
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From: Warner Robins, Ga
Default RE: ignition problem ??

ORIGINAL: riggermortis

the thing that baffels me is that it started all of the sudden. while i was rideing ran good stoped at a light and then ran s#!tty, just like that.
Yeah I kind of think we are both missing something simple here. Just gotta figure out what it is.

scooter
 
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Old Dec 6, 2007 | 09:53 PM
  #18  
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Default RE: ignition problem ??

it is just foam with a metal skelaton. the foam is just like the foam you would find on your lawn mower or something to that effect. from what i can tell the gas didnt affect it. i dont know too many people with bikes and the people i do know that have them have newer ones with efi. my wife knows a couple of people at work that have older ones though so i think what i will do is ask her to ask them if any body has a spare carb that i can try running for a minute with the air filter on and see if the problem is in the carb or not. hey thanks for all of your input it has been very helpful ! i will keep the thread updated as to what i find out.
 
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Old Dec 6, 2007 | 09:58 PM
  #19  
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ScooterHD69
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Default RE: ignition problem ??

Yeah keep us updated, if you could borrow another carb at least we could rule out something.
Good luck and keep us posted.

Scooter
 
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Old Dec 7, 2007 | 10:30 PM
  #20  
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Default RE: ignition problem ??

If you have a keihin carb. The midrange jet should have a rubber plug covering it.

If that plug is not tight, or leaks, that will cause a mid range loss of power, sputtering

and popping.
 
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