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ekrossi
Samba Member
Joined: March 16, 2008
Posts: 181
Location: outside Jonesborough, TN
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 Posted: Tue May 15, 2012 7:49 am Post subject: Noise from 1 carb..... |
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I've noticed a thing with my Kads which I can't quite figure out. I run a single port engine, and from the beginning I've had a loud noise from the carbs, sort of a "brraaapp" sound when I accelerate, or when the engine is under load. I always associated this noise as the "carb roar" that often comes from switching to dual carbs.
While doing some recent tuning, I discovered that the noise is coming only from the driver's side carb. Don't know how I never noticed this before, but the passenger side carb doesn't seem to make the same noise at all. Carbs appear to be well balanced, and adjust well at idle. Valve adjustment is right on. No complaint with performance, they seem very responsive. Any ideas? |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Tue May 15, 2012 8:58 am Post subject: |
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| #3 retarded? smaller gasket on 1&2 side causing a antireversion? |
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Mack_T
Samba Member
Joined: January 01, 2003
Posts: 117
Location: Rohnert Park, CA
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| Posted: Tue May 15, 2012 3:42 pm Post subject: |
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Usually I hear the sound louder from one side than the other when the linkage is not adjusted correctly... it is possible to have the idle the same on both, but then the linkage might have a little more push on one carb than the other.
Depending on the linkage used, I would try to loosen the side that is making noise. I run CB Performance hex bar linkage (on all carbs I've used in the past) and it makes it easy with turnbuckles on each side. I just loosen the nuts, and adjust the turnbuckle on one side to match the other. Engine running, part throttle.
I could be way off, but it's something to check 
Good luck! |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Wed May 16, 2012 8:37 am Post subject: |
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| some linkages have diferent ratios,(empi had rong &different raitos on thier due to using a thicker material for the arm¬ compensating for the bend radi witch threw off the ratio) check to see if your all even, you might have one in the rong hole& need to flip &stick in another hole.or make a new hole alltogeather. if thats the issue. |
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ekrossi
Samba Member
Joined: March 16, 2008
Posts: 181
Location: outside Jonesborough, TN
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| Posted: Wed May 16, 2012 6:55 pm Post subject: |
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| I use the Scat linkage which seems to work very well. I did have to rig up a shade tree connection from the throttle arms on the carbs to connect it without hitting the fresh air tubes on the fan shroud. It appears to be opening the carbs evenly, but maybe I should check the synch at different points in the throttle operation to be sure it is. |
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Mack_T
Samba Member
Joined: January 01, 2003
Posts: 117
Location: Rohnert Park, CA
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| Posted: Wed May 16, 2012 8:05 pm Post subject: |
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| Yeah, I recommend (being very careful!) to crack the throttle a little, and stick your head between the carbs. Listen for the one making more noise than the other and adjust accordingly |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Wed May 16, 2012 8:33 pm Post subject: |
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| Mack_T wrote: |
| Yeah, I recommend (being very careful!) to crack the throttle a little, and stick your head between the carbs. Listen for the one making more noise than the other and adjust accordingly |
not if you have long hair or a neck tie!!!(or big titties that may get cought in the fanbelt)  just tryen to cover it all. depending on if you can see down the throtes of the carbs, have someone mashit wot and look to see if there both wfo.(motor off of corse) |
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