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Old August 22nd, 2013, 05:14 AM   #1
Jeffro2749
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Bogs down when accelerating, max 5-7k RPM

Hey Guys,
Just found this site and loving it already. I have a 2006 250 and recently started having issues. It started bogging down on me last night when accelerating. Sitting in neutral and revving it up upon starting it and it wouldn't get over 6k RPM's. when I go to take off it bogs down around same RPM level then will die when I come to a stop. Then it becomes very difficult to start unless I let it sit a while. Then same problems when I try again. Any ideas or help would be appreciated.
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Old August 22nd, 2013, 05:19 AM   #2
csmith12
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Welcome Jeff!

To help us figure out your issue can you answer the following please?

How many miles?
Last time the carb was cleaned?
Last time the valves were checked/adjusted?
Last oil change?
Any mods to exhaust/airbox/jetting?
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Old August 22nd, 2013, 05:37 AM   #3
Jeffro2749
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Quote:
Originally Posted by csmith12 View Post
Welcome Jeff!

To help us figure out your issue can you answer the following please?

How many miles?
Last time the carb was cleaned?
Last time the valves were checked/adjusted?
Last oil change?
Any mods to exhaust/airbox/jetting?
17k
not sure on the rest except oil change has been a while. I just bought the bike in mid June.
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Old August 22nd, 2013, 05:45 AM   #4
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Hmmm... 17k huh.

Possibilities then;

Simple, quick and cheap fixes
Clogged fuel filter
Petcock issues
Air filter issues
Bad gas/water in gas? Flush and fill
Use some Seafoam or similar product

More involved fixes but still pretty cheap and easy
Gummed up/dirty carbs (Use the new howto vid!)
Valve check/adjustment
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Old August 22nd, 2013, 06:07 AM   #5
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Another thought, vacuum leak. A quick spray mist of carb cleaner around the vac lines will rev the engine if you have a leak.
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Old August 22nd, 2013, 06:27 AM   #6
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Welcome to our site, Jeff !!!

Enough gas is not reaching your carbs for some of the reasons explained above.

Read our Riding Skills section.
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Old August 22nd, 2013, 07:03 AM   #7
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Old August 22nd, 2013, 07:29 AM   #8
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Quote:
Originally Posted by csmith12 View Post
Hmmm... 17k huh.

Possibilities then;

Simple, quick and cheap fixes
Clogged fuel filter
Petcock issues
Air filter issues
Bad gas/water in gas? Flush and fill
Use some Seafoam or similar product

More involved fixes but still pretty cheap and easy
Gummed up/dirty carbs (Use the new howto vid!)
Valve check/adjustment
^ This pretty much has it covered.

Most likely it's not getting enough gas or enough air. Bad gas will also give you unusual problems, as will an almost-dead battery.

I recall a similar problem that turned out to be something under the seat blocking the intake.
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Old August 22nd, 2013, 07:36 AM   #9
Jeffro2749
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Is there a way to drain the fuel tank without taking it off the bike itself?
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Old August 22nd, 2013, 07:40 AM   #10
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Quote:
Originally Posted by Jeffro2749 View Post
Is there a way to drain the fuel tank without taking it off the bike itself?
http://faq.ninja250.org/wiki/How_do_...e_fuel_tank%3F

http://faq.ninja250.org/wiki/Draining_the_carbs

http://faq.ninja250.org/wiki/Rebuild...tcock/fuel_tap

http://faq.ninja250.org/wiki/How_doe...e_tank_work%3F
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Old August 22nd, 2013, 07:59 AM   #11
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sounds like the same problem i recently just overcame with my bike. My issue was water in the gas tank and carbs. Try draining the carb bowls. It's quick and easy to do and will tell you whether there's water in it or not. Use something clear to collect the gas.
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Old August 22nd, 2013, 09:36 AM   #12
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Whens the last time you had your valves adjusted?
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Old August 22nd, 2013, 09:55 AM   #13
Jeffro2749
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I just bought the bike a couple months ago so there's no telling to be honest with you. This is my first bike so it's all new to me.
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Old August 24th, 2013, 01:56 PM   #14
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Unless you got a copy of the maintenance records when you bought the bike, you have to assume there was no maintenance.

Bogging down past 5K rpm usually means the pilot jet in the carbs are clogged.

I would recommend doing a valve adjustment and a thorough carb cleaning and chaining the oil and filter all at the same time. Make sure you read my blog (link below) regarding overtorquing the rockers or else you could destroy the engine. That is just routine maintenance.
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Old August 24th, 2013, 02:48 PM   #15
Jeffro2749
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Had it towed to a local shop and the owner said one valve was fine with the compression and the other was extremely tight. Said it would cost me about $150 in labor to try and fix the valve and only then would they be able to tell me if the engine is screwed or not. Sound probable guys? I know nothing about bikes.
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Old August 24th, 2013, 03:02 PM   #16
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Quote:
Originally Posted by Jeffro2749 View Post
.........I have a 2006 250 and recently started having issues. It started bogging down on me last night when accelerating........
Valves don't produce those from-night-to-day symptoms.

Knowing that one valve is tight takes much of the corrective work; hence, I wouldn't use the services of those mechanics.
Instead, I would follow the advices of posts #4 and #11 above.
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Old August 24th, 2013, 04:26 PM   #17
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Quote:
Originally Posted by Jeffro2749 View Post
Had it towed to a local shop and the owner said one valve was fine with the compression and the other was extremely tight. Said it would cost me about $150 in labor to try and fix the valve and only then would they be able to tell me if the engine is screwed or not. Sound probable guys? I know nothing about bikes.
What did he do to come to that conclusion? Sounds fishy to me. Does this guy primarily work on Kawasaki Ninjas - or other bikes? If it runs at all, its probably not screwed.

When a Ninja has problems like that, the most common cause is fuel and not valves. But because you don't know when your valves were adjusted last, you need to do them even if they aren't the cause of your current problem.

Just saying, if you are going to ride a older model bike, then its really not practical to take it to a shop every time work needs to be done on it. You'll go broke really fast. You really need to learn how to fix and maintain it yourself.

But if you happen to be a mechanical zero, then I would recommend getting a new bike that comes with a warranty.
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Old August 25th, 2013, 09:03 AM   #18
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Quote:
Originally Posted by Jeffro2749 View Post
Had it towed to a local shop and the owner said one valve was fine with the compression and the other was extremely tight. Said it would cost me about $150 in labor to try and fix the valve and only then would they be able to tell me if the engine is screwed or not. Sound probable guys? I know nothing about bikes.
I doubt your engine is screwed. I suggest you take the advice that was given here, isn't that why you made an account on this website? You could probably have your bike running today if you take the time to look through the reasons that were listed here. I've had a couple handfuls of issues with my ninja. If I couldn't figure it out I would come on this website. Every single time i've gotten it worked out with the help of everyone here, and my bike has yet to see a mechanic. I've probably saved myself hundreds and hundreds of dollars by following the advice of this website. Did you miss the post i made in this thread that said I was having the same exact problem as you earlier last week? Sorry, not trying to be rude.
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