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Discussion Starter · #1 ·
So I made the mistake of not prepping my bike for the winter and it sat outside. When it started getting warmer I couldnt get the bike to start (had 1/2 tank of bad gas). I drained out all the gas and refilled it with some "mechanic in a bottle" added that was recommended by a local shop. I then had issues with my battery so I charged it with a trickle charger and its 100% now. I also had to get some spray that supposedky starts engines no matter what and I removed the air filter and gave it a spray and boom now it starts.

So...now I am able to start the bike every time without problem, but it is acting up. Because its warm out now I can start it without using the choke just fine, but after playing with it I noticed that the bike would only run without the choke and it was sitting over 2k rpms at idke. When the choke was applied the roms would immediately drop and the bike would really struggle shut off.

One day later I tried it again and the bike still starts everytime, but now the choke appears to do nothing. Also, if I give it throttle the bike will rev up for a few seconds and then die if I hold the throttle. After about 2-3 seconds the throttle stoos revving the bike and I have to release to stop the bike from dying.

Sorry for the long post I just wanted to give as much detail as I could. I have been riding almost 2 years but I am very new to servicing the bike myself but I want to learn. Im thinking maybe its dirty carbs but ckeaning them seems very difficult. I bought some gumout to add to try to clean them but im worried about putting too much additives in my tank.

Any advice or knowledge would be greatly appreciated. Its getting really nice out now and I really want to get back on my bike!
 

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Discussion Starter · #3 ·
Yeah yeah I know it was the first winter and I didnt even think about it till it was too late. A lot of people who talk about cleaning the carbs are in response to bikes not starting but my starts just fine..woukd the dirty carbs lead to the bike dying with added throttle?
 

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Yeah yeah I know it was the first winter and I didnt even think about it till it was too late. A lot of people who talk about cleaning the carbs are in response to bikes not starting but my starts just fine..woukd the dirty carbs lead to the bike dying with added throttle?
Myself i'd get some carb cleaner u add to ur tank n drygas too, and try that first. U can also add some of that stuff i linked to ...to help or something maybe similar. If that don't help u probly have some varnish/dirt in ur filters n jets.








 

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If you leave gas in the carbs too long without some kind of stabilizer, the jets inside the carbs will become clogged. Although the bike may start, the circuits responsible for more gas when you turn the throttle will not flow fuel, thus a stalling engine.

Your symptoms are indicative of basically dirty carbs. Removal and manual cleaning is highly recommended.

Here is some more helpful info about carbs.

How Constant Velocity Carburetors Work
http://www.motorcycleproject.com/motorcycle/text/how_cv_carbs_work_v3.swf

Motorcycle Carburetor Theory 101
https://docs.google.com/file/d/0B8nSiz90rrfUSHVGV1JkRUR3eDg/edit?pli=1

Carburetor Jet Tech
http://www.motorcycleproject.com/motorcycle/text/jet_tech_v3.swf
 

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If you leave gas in the carbs too long without some kind of stabilizer, the jets inside the carbs will become clogged. Although the bike may start, the circuits responsible for more gas when you turn the throttle will not flow fuel, thus a stalling engine.

Your symptoms are indicative of basically dirty carbs. Removal and manual cleaning is highly recommended.

Here is some more helpful info about carbs.

How Constant Velocity Carburetors Work
http://www.motorcycleproject.com/motorcycle/text/how_cv_carbs_work_v3.swf

Motorcycle Carburetor Theory 101
https://docs.google.com/file/d/0B8nSiz90rrfUSHVGV1JkRUR3eDg/edit?pli=1

Carburetor Jet Tech
http://www.motorcycleproject.com/motorcycle/text/jet_tech_v3.swf
I was more thinking trying some diesel......:dance::dance:








 

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Discussion Starter · #8 ·
Okay thank you both for your quick responses. Im going to try the carb cleaner and see if that fixes the problem, and then ill most likely look into taking them out and cleaning them at some point even if I get it running. Never done anything like that but ill figure it out (thank God for YouTube)
 

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Okay thank you both for your quick responses. Im going to try the carb cleaner and see if that fixes the problem, and then ill most likely look into taking them out and cleaning them at some point even if I get it running. Never done anything like that but ill figure it out (thank God for YouTube)
:thumb::thumb::thumb::thumb:








 

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.... Im going to try the carb cleaner and see if that fixes the problem, and then ill most likely look into taking them out and cleaning them at some point even if I get it running. Never done anything like that but ill figure it out (thank God for YouTube)
You may try the carb cleaner, but it will not reach where you need it too. Many have tried and many have had to remove the carbs anyway. If it's done right the first time, it will save you a lot of frustration. Yes...YouTube is your friend.
 

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You may try the carb cleaner, but it will not reach where you need it too. Many have tried and many have had to remove the carbs anyway. If it's done right the first time, it will save you a lot of frustration. Yes...YouTube is your friend.
But the offroad diesel will do it for sure.......:whistling::whistling:








 

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Blue Ghost has it pretty well covered, but you may want to look this over as well - Intake - Ninja250Wiki

Plenty of good info there.

It doesn't take long to clog the main jet, especially if the gas is old to start with.

For next season, plan ahead and add fuel stabiizer before your last ride. Fill the tank to the top with Ethanol-free gas (87 if available). Change the oil and filter. Drain the float bowls. Charge the battery occasionally.

That way when you hit the button in spring it will fire right up. It may take a few cranks to get the fuel flowing at first because the fuel petcock needs vacuum to open and fill the floatbowls.


Jay
 
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