 Update on throttle response../
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Joined: Nov 2007
Posts: 28
Greenhorn
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OP
Greenhorn
Joined: Nov 2007
Posts: 28 |
Well,
after taking everybody's input, from the listed post (http://www.bonnevilleamerica.com/forums/showflat.php?Cat=0&Board=Carbs&Number=271700&PHPSESSID=&fpart=1#Post271700) I tried almost everything I could. I made my own monometer, balanced the carbs, which by the way were so far off I had to turn the engine off to adust and then turn on to check initially. But they are good now. I pulled the shims out and tried the tbs needle un-shimmed, then put the 45 pilots back in, then tried the stock needles with one shim. Still has the hesitation from low to early mid range throttle. It seems to only be most noticeable if I roll the throttle slowly. If I pound on it, it is not as bad, but still jumpy. Could it be due to a bad vavle seat?? This is annoying the ****** out of me!!!
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Re: Update on throttle response../
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Joined: Feb 2007
Posts: 23,237 Likes: 63
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,237 Likes: 63 |
have you checked the diaphrams at the top of the carbs that actually lift the needles? If you do be very careful to seat them back properly when re-installing. A small leak in those would cause what you describe.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Update on throttle response../
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
I would doubt a bad valve seat as that would be present throughout the rpm range, it's more likely that Ian's correct about a vaccuum leak...tops of the carbs, manifold rubbers, or squirrel condoms all come to mind from what you've described.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Update on throttle response../
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Joined: Nov 2007
Posts: 28
Greenhorn
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OP
Greenhorn
Joined: Nov 2007
Posts: 28 |
Quote:
have you checked the diaphrams at the top of the carbs that actually lift the needles? If you do be very careful to seat them back properly when re-installing. A small leak in those would cause what you describe.
You know, the first time I had a problem with this was when I was adding a shim to the needles and then put it together, rode the thing the next day for like 700 miles and it ran like crap. I thought that very same notion about the diaphram not seating right. So the next day I took it apart again and made sure there were no tears in it and that they were seated right and they were. I replaced all the vacuum hoses and condoms, so I am at a loss of thought.
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Re: Update on throttle response../
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Joined: Feb 2007
Posts: 23,237 Likes: 63
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,237 Likes: 63 |
Could try spraying carb cleaner around all the rubber connections,condoms,intake rubbers,etc.. and if the engine changes at all there is a leak that you can't see. If no leak then I am not sure what to tell you to check other than the things you have already mentioned. If it is in the ignition timing adv. you may need to plug it into a computer. (I doubt that is the problem but it is possible)
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Update on throttle response../
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Joined: Nov 2006
Posts: 1,302
Learned Hand
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Learned Hand
Joined: Nov 2006
Posts: 1,302 |
I had the same problem with the hesitation after adding shims and even after trying twice checking the diaphrams they were the cause of my hesitation. before putting the covers back on work the diaphram into the groove all the way around then my problem went away.
mike
2006 neon blue speedmaster
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Re: Update on throttle response../
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Joined: Aug 2005
Posts: 2,525
Loquacious
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Loquacious
Joined: Aug 2005
Posts: 2,525 |
I had simmilar issues with hesitation in throttle responce. Drilling my slides cured it
Erwin
05 America
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Re: Update on throttle response../
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Joined: Jan 2005
Posts: 1,457
Learned Hand
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Learned Hand
Joined: Jan 2005
Posts: 1,457 |
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