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Old 03-21-2009, 07:56 PM   #1
CaligoneTx
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No throttle on katana 600

ok; now trying to get the katana to run since the busa ran away.

^^^lol that's funny right there.


Anyways, put about 100 miles on it w a new battery 2 weeks ago. Filled w a new tank of gas, drove it on St. Patricks day and it began to hickup on me when started. Afterwards(second stop) ran just fine.

The condition came back bad this last Tuesday, anything over idle/light throttle killed the bike/bogged it down.

I took the tank off, drained the gas. Found some of the gas was around 10% gas, remainder water/ethanol. I blew out the pepcock, vacuum lines, etc. The venturi hose is clear(verified w brake clean spraying through the throttle.) I added some stabil, allowed that gallon to idle out of the bike.

On choke, the bike will rev up to 7-8krpms. Will idle/start just fine on the idle circuit. Now when I give it gas, I can rev it at 20% up to around 8k. Anything more and it begins to bog down. I can hold the bike at full throttle and it will oscillate between 3-4krpms. The shutter plates(or whatever you call them) infront of the carbs will begin to open but not fully when throttle is cracked open. I have pulled the top caps off, checked the idle diaphrams and needles.

I checked the mixture screws, unplugged the TPS sensor(no change in characteristics... why is this there?) Underload up the slightest hill it will die due to throttle requirements.


Any suggestions? Other then pulling and cleaning the carbs? I'd think I should get a little throttle response and not have it stick so bad. Its a problem with all cylinders, not a misfire.
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Old 03-21-2009, 08:00 PM   #2
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probably trash and stuff in your jets. clean the carbs and you should be good IMO
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Old 03-21-2009, 08:03 PM   #3
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Can that be done on the bike? If I pull the top diaphram covers off and remove them?

Im going stir crazy not being able to ride.
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Old 03-21-2009, 08:15 PM   #4
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unless there is a screw cap on your float bown your gonna have to take the float bowl off. i use to have a katana but i cant remember if they have a hex cap or not
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Old 03-21-2009, 08:23 PM   #5
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Did you pick up some carb cleaner? My buddy's bike did the same thing we took the carbs off cleaned them... Run like a champ after that. I know thats what your trying to avoid, But might be the only solution.
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Old 03-21-2009, 08:24 PM   #6
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Quote:
Originally Posted by KillInTime View Post
Did you pick up some carb cleaner? My buddy's bike did the same thing we took the carbs off cleaned them... Run like a champ after that. I know thats what your trying to avoid, But might be the only solution.
+1 cleaning the carbs should fix the problem. just be sure your float bowl gaskets are good before you put them back together
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Old 03-21-2009, 08:24 PM   #7
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Last edited by Badzx14r; 03-21-2009 at 08:27 PM.
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Old 03-21-2009, 08:26 PM   #8
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CAli, I f-ing hate carbs, for some reason only on Bikes.


I have had many issues through the years with them, I remember when the first bike out with FI came out ( SRAD ) I was so happy.

I currently have a four wheeler ( Bought it new ) that has ran awsome since I bought it untill a buddy just playing around one day tipped it over on its side, that thing hasnt ran the same since and Ive taken the carb off twice ( I think its the needle now ).

And this is just 1 carb.

You need to pull them bad boys off clean and maybe even have some one synch them, lets just hope that works
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Old 03-21-2009, 08:30 PM   #9
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Old 03-21-2009, 08:33 PM   #10
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That's what my katana did until I cleaned the carbs, it's a , but it ran so much better afterwards.
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Old 03-21-2009, 08:37 PM   #11
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how r you Matt ? wish that you doing well ! so sad that your busa is gone
dang thefty.
on katana,i would pull carbs off ( all 4 as a unit ) the bike and 1 by 1 carb:
open top cover-check diaphram and needle and clean vacum passage ( very tiny) that your power-off throttle enrichment.
then turn carb up side down-open fuel bowl-remove float / seat and main jet tube and clean them all.....they proberly clogged up due age-ethanol corrosion.....i'll be home tomorow if you need a hand
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Old 03-21-2009, 08:45 PM   #12
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i pulled them off on my last post. I took off the first two bowl covers and dissassembled the carbs... I can see through the jets and everything... not a spec on anything.
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Old 03-21-2009, 08:48 PM   #13
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Old 03-21-2009, 08:50 PM   #14
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Its easy Matt, I just did a Katana 600 yesterday, just pull the whole bank of carbs, flip upside down and pull 1 bowl at a time and pull 3 jets, 1 at a time if needed, spray carb cleaner and compressed air untill U can see daylight in each jet and then reinstall, clean the bowls out and put back on and then go to the next carb, this should be gravy for U, mine ran great afterwards, U work on 50 -100k cars for a living U can handle this in your sleep
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Old 03-21-2009, 09:26 PM   #15
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I cleaned out all of them and it continues to do the same thing. fk it I honestly dont give a **** anymore.
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Old 03-21-2009, 09:28 PM   #16
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No matter what U do it will never be a busa, Poor guy I know its killing U, Ur welcome to come and ride mine
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Old 03-21-2009, 09:34 PM   #17
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Old 03-21-2009, 11:37 PM   #18
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dont feel like reading all the way through, float bowls have to come off.
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Old 03-21-2009, 11:48 PM   #19
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I had one do the same thing. I filled the carb. bowls with Berryman Chem tool and let it sit for about an hour and drained through the screw. I repeated it about 4 times and it cleared it right up. It took a few cans. I used the aerosol type not the liquid.
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Old 03-21-2009, 11:49 PM   #20
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I didnt have to remove the carbs this way and it still worked.
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