Suzuki Katana 600 ('99 model) choking on me, not firing up..?

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j s

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Hi all biker gurus,

This is yet another query to my never ending quest to unravel the mysteries of a Suzuki Katana 4 cyl engine.. :P
Apparently, my bike was running fine for a couple of days, but recently it's started to quit on me again. It just quits on me and doesn't really fire up, even with choke..
It just keeps going on with the ignition starts.. but to no rescue.
If it does, by any luck, start up (like after a day or so), it doesn't stay running for very long..
Some one advised and I tried covering the air filter box hole a little to which it did pick up some rpm and stayed running for a bit longer, but then, cut off again, and didn't start back.. Could it be the carbs needing synchro or being overly flooded with fuel ?
I've got enough oil, and fuel, so can anyone help explain what this could be ??
or any steps I could try to get it running smoothly again?
 
Try changing the spark plugs before getting to involved with technical repairs.
Semi-fouled plugs can wreak havoc on a perfectly fine tuned engine.
 
My 99 Katana was doing nearly the same thing. I took the carbs apart and found that one of the hard rubber tips of the floats broke off and got jammed under the float holding it wide open, along with a little dirt on all the float needles. I got the hard rubber out, cleaned the rest, put it back together, and now it runs better than it ever has. Maybe one of the rubber seals has broken away, and is letting way too much gas in. If you have already had the carbs all apart then they do need to be synchronized.
 
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