Bogging upon throttle up. - KawiForums - Kawasaki Motorcycle Forums
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post #1 of 7 (permalink) Old 10-30-2009, 08:55 AM Thread Starter
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Bogging upon throttle up.

I'm sure there are other threads about this but the search function seems to be borked. So if there is a thread with a solution to this don't hesitate to post it and say "look here n00b".

I live in Houston, TX where the weather is usually decent for riding year-round. Yesterday I was riding home and got caught in a major rain storm. As I got home the bike seemed to not want to throttle up and seemed to bog down when I opened the throttle. So I let it sit indoors overnight and when I went to warm it up this morning it warmed up and idled fine. But again, when I tried to open up the throttle one bit it bogged down. If I let the throttle go back to closed it would idle properly. When I put the choke full-on it would rev up to 6-7k which seems normal. I'm thinking maybe during the rain storm I might have gotten water in the intake. That's the only thing I could think of that would warrant such behavior.

If this is the problem what steps would I have to take to get this thing operating properly again?

Thanks for your help.


EDIT: To update, I've pulled the air filter and started it with the air filter removed, still idles fine bogs above idle. I also opened up the gas tank and ran it, same results.

Last edited by Jarsh; 10-30-2009 at 10:19 AM. Reason: Update
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post #2 of 7 (permalink) Old 10-30-2009, 10:57 AM Thread Starter
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Warmed it up again for 20 minutes. Tested the throttle. Engine rev's up to 4k for about 1 second then the engine bogs. After waiting for the engine to return to normal idle speed and turning the throttle again it goes back up to 4k for about a second. I did this a few times to see if conditions improved but it stayed consistent. Full-choke still yeilds a 6-7k rpm under no load.

Please advise.

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post #3 of 7 (permalink) Old 10-30-2009, 03:02 PM
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drain all the gas from your tank and refill with fresh gas. Also, drain your carb bowls. Sounds like you might have gotten water in the gas and it's sitting in the bowls.

what year is your bike and have you been riding it consistently prior to this happening?
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post #4 of 7 (permalink) Old 10-31-2009, 05:57 AM
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Mine does this until it's fully warm. Are you sure that's not it?

Even a lengthy warm-up doesn't do it sometimes (cool weather)... I just gotta get out and ride it. Be careful because if you open the throttle and feather the clutch to keep the engine from dying it will continue to bog for a few moments and then suddenly ramp the RPMs sky-high.

Just moved to SoCal from the Atlanta region (Newnan, GA)... Yes, I rode my 250.

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post #5 of 7 (permalink) Old 11-02-2009, 10:30 AM Thread Starter
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Fixed the bike. Thanks KKim, draining the carbs did the trick. I appreciate the quick response guys.
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post #6 of 7 (permalink) Old 11-02-2009, 10:47 AM
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weird. I would think spark. It may not be a bad idea to double check the plugs also. Even though its fixed

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post #7 of 7 (permalink) Old 10-26-2010, 01:05 PM
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Bike dying with choke and gas...

Okay. I have a wonderful problem and have parted ways with the (now ex) boyfriend that knew what to do in these situations.

I got my bike into the garage storage I wanted it in, but it's running terribly. It has only a little over 200 miles on it (it was a terrible summer), brand new 2008 250. I run it probably once every two weeks, maybe not enough? But recently it's been giving me problems. I'll have it running with full choke, let it warm up for over ten minutes, and when I give it gas, it still dies. It sounds like it's really not getting enough gas, but I do have gas in there.

I feel like a really dumb girl right now, but I do want to get this thing running correctly so I can figure out how I'm going to winterize it. You live and learn, right!? Any help would be great. Unfortunately for me, I don't know a lot about bikes mechanically.

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