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Katana How-To's & FAQ's A forum filled with write-ups, FAQ's, and visual aids for
mechanical & cosmetic modifications to your Katana.

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Old 03-23-2007, 07:05 AM   #21
steves
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Clogged idle jets or something in the pilot circuit. The main jets are only used when the throttle is open.
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Old 03-24-2007, 04:28 AM   #22
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But the mains DO have ne effect on other parts of the system . They'll effect how much gets through the pilot circuit , as well as what can get "around" the needels .
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Old 04-26-2007, 03:43 PM   #23
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More air = more turns out!) (BE CAREFUL! turn makes a BIG difference!)

??? is this right i thought it was other way around ???
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Old 04-27-2007, 01:38 AM   #24
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Quote:
Originally Posted by evil-eye
More air = more turns out!) (BE CAREFUL! turn makes a BIG difference!)

??? is this right i thought it was other way around ???
You are correct , sir . More turns out add more FUEL .
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Old 08-13-2007, 09:51 AM   #25
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Wait... wait, wait, so, which is it then ? AFAIK the more you turn the mixture screw out, the more lean the mixture gets .. ?
Coz, when i first set my Kat to 0,7 turns out, it almost shot fuel out of the exhaust. But now the A/F mixture screw is 2,1 turns out and she runs much better.
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Old 08-13-2007, 11:49 AM   #26
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0,7 and 2,1? Huh?

The more you turn the screw out, the richer the mix.
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Old 08-13-2007, 03:55 PM   #27
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Are you sure ? Richer as in the engine gets more fuel than air ? I mean, AFAIK, if you turn the screw out, then more air goes through the tubes and it resists fuel (braking-air if I translate it rough from my language). Damn...
Now im extremely confused. Thing is, my bike took 10 liters to 100km so I was sure the mixture was too rich. And the exhaust fumes smelled like pure gasoline. With 2,1 turns out, it doesn't smell almost at all. :/ But, the tank seems to get empty as quick as before.
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Old 08-13-2007, 04:25 PM   #28
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http://www.thumperfaq.com/fuel_screw.htm
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Old 08-14-2007, 02:24 AM   #29
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Quote:
Originally Posted by Villu_EST
Are you sure ? Richer as in the engine gets more fuel than air ? I mean, AFAIK, if you turn the screw out, then more air goes through the tubes and it resists fuel (braking-air if I translate it rough from my language). Damn...
Now im extremely confused. Thing is, my bike took 10 liters to 100km so I was sure the mixture was too rich. And the exhaust fumes smelled like pure gasoline. With 2,1 turns out, it doesn't smell almost at all. :/ But, the tank seems to get empty as quick as before.
Well , my bike () was ALWAYS really rich . Sometimes smelled like DIESEL . Black plugs , black exhaust . Now that I figured it out , it doesn't reek like it used to . However , my mileage has not drastically improved as I'd hoped . It seems like under SOME circumstances my milage may have gotten a tad better , but on average , it's still fairly close to what it was when I was still REALLY rich . To get TRULY bad mileage , I had to be hitting on 3 or less cylinders .....
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Old 09-22-2007, 08:21 PM   #30
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this thread is very interesting

I just got my kat, and the guy I got it from told me he cleaned the carbs.
After getting such sucky performance and gas mileage, I figured that this guy was lying.
I took the carbs out, and they're almost SPOTLESS!
but the bike is running VERY rich, so that means I have to adjust the A/F screws right? ('92 750)
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