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Carburetor Cleaning & Tuning 101

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Old Mar 8, 2010 | 06:00 PM
  #61  
mariof's Avatar
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hey you guys, i bought a can of seafoam and want to use it in every place possible to see if i can revive some power. a friend of mine who owns an r6 says he ran some of it through a vaccum line. which line could we run it through??

thanks
 
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Old Mar 8, 2010 | 06:59 PM
  #62  
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There's no need to run it through any vacuum hoses, because only air travels through a vac line... Putting fluids into a vac line will render it useless.
 
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Old Mar 9, 2010 | 01:43 PM
  #63  
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Default Carb Vaccum Measurement

Hi, guys.

well, i read this excellent thread but i have 2 questions, maybe simple to the most people but i'm a cbr rookie.

1st.- Which is the order that i need to follow to have the same level between carbs?

2nd.- when the bike starts to make the carbs balance, which is the correct level?, i know this, we can only have from 0 to -1 bar, but if i have my carbs unbalanced, which is the best point to start to make a good balance.

i see the hurricane CBR thread and that guy show a carbtune and the levels are in cmHg from 8 to 40cmHg, and he balance all carbs to 22 cmHg, anybody knows if 22 cmHg are the setpoint?

thanks for your help!!
 
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Old Mar 9, 2010 | 04:20 PM
  #64  
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1 - It's in the service manual. FOLLOW ALL STEPS EXACTLY.

2 - This is an invalid question. The idea is not to attain a specific level, but to have all levels the same for each cylinder. As everyone's bike is slightly different, everyone's levels will be different. Read the service manual, and you will see that you are "balancing" the levels to each other, not trying to get them "up" to something.
 
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Old Mar 9, 2010 | 05:55 PM
  #65  
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Originally Posted by johnnyx
1 - It's in the service manual. FOLLOW ALL STEPS EXACTLY.

2 - This is an invalid question. The idea is not to attain a specific level, but to have all levels the same for each cylinder. As everyone's bike is slightly different, everyone's levels will be different. Read the service manual, and you will see that you are "balancing" the levels to each other, not trying to get them "up" to something.

Got it, thanks for your time.
First round is mine
Cheers!!
 
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Old Mar 10, 2010 | 02:01 PM
  #66  
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hi if your carbs were out of sinc. what would be main problem you would have,? would it only be tick over prob. or would you notice it at 7000 rpm + .??. thanks.
 
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Old Mar 11, 2010 | 01:10 PM
  #67  
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Originally Posted by scorpion2010
hi if your carbs were out of sinc. what would be main problem you would have,? would it only be tick over prob. or would you notice it at 7000 rpm + .??. thanks.
Out of sync carbs can cause ALL sorts of problems. That's why a carb cleaning is always the first thing that's reccomended with goofy engines.
 
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Old Mar 11, 2010 | 02:33 PM
  #68  
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thanks for reply john reason i am asking is i have cleaned carbs on my 1989 1000f because had a flat spot at about 7000rpm but on stripping carbs they were very clean, when i rev bike on stand it hesitates at 7000rpm but if i pull choke back and rev it it revs past 7000 rpm allright ,its had new plugs ,air filter and oil change etc.only thing i can think of was balance carbs.petcock is fine to.any suggestions appreciated.
 
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Old Mar 11, 2010 | 06:00 PM
  #69  
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Originally Posted by scorpion2010
thanks for reply john reason i am asking is i have cleaned carbs on my 1989 1000f because had a flat spot at about 7000rpm but on stripping carbs they were very clean, when i rev bike on stand it hesitates at 7000rpm but if i pull choke back and rev it it revs past 7000 rpm allright ,its had new plugs ,air filter and oil change etc.only thing i can think of was balance carbs.petcock is fine to.any suggestions appreciated.
It is jetting related, you need to tune out the flat spot with bigger jets or moving the needle clip down or shim the needles up
 
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Old Mar 12, 2010 | 09:01 AM
  #70  
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Yes, sorry, I was being vague and bundling all this together. A proper carb cleaning isn't just about scrubbing off some gunk. It should involve proper tuning, which obviously includes jetting because you took them out, and also a final sync.
 
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