carb issue.

justin_ninja · January 13th, 2013, 07:12 PM

so i have cleaned the carbs the jets, and triple checked it all. my problem is that it will only idle about 3200 rpms and if i hit the gas too fast it will die or bog down. i just did valve adjustment on it and still same thing, also replaced the float needles and adjusted them to 17mm. i have the stock air box on it and stock exhaust and also new battery. i have messed with the air/fuel mixture and it is set at 2.5 turns. any ideas.................

Motofool · January 13th, 2013, 07:26 PM

Are you sure that your diaphragms are undamaged and are responsive to changes of engine vacuum?

justin_ninja · January 13th, 2013, 07:33 PM

The slide move and when I hit the gas they open. Or are u talking about the one on the side of the carb with the vacuum lines to it?

Motofool · January 13th, 2013, 07:50 PM

Check this thread discussing a similar problem:

http://www.ninjette.org/forums/showthread.php?t=121809

justin_ninja · January 13th, 2013, 10:59 PM

looked it over and the only thing i can think of the air/fuel screws are not adjusted right. so tomorrow i will be looking over them and adjusting them to see if i can get it to run any better,

anyone know if in out out to have more fuel ?

i have to use choke to get it to start when its warm.

justin_ninja · January 16th, 2013, 08:54 PM

ok so i have dipped the carbs and it runs great above 3k but when it goes down to idle just dies, i have messed with the a/f now out 3 1/4 turns and it kind of wants to idle about 2k if i hold the throttle. if i give it any gas it will jump to 4k and then stay there for a min then drop down little at a time to quiting... unless i blip the throttle then it will go up to 4k and back down slow and stall if i dont give it more gas. im going to say that the jets are clean and can see threw them. the ports are clean from what i can tell, i can blow air threw them and when i dripped water in there the jet goes it comes out where it should in the carb im at a loss for whats going on.. help...............

Motofool · January 17th, 2013, 06:39 AM

Check that enough fuel is reaching the carbs.

It would be good to check the level inside the bowls.

justin_ninja · January 19th, 2013, 06:09 PM

ok good news............ so after checking the valves yesterday and doing a little adjusting and today i put the tank back on and started it, after a few mins it settled down to 2k good sign, so i messed with the sync and air/fuel screws and it settled down to 1500...so it is idling ok if u ask me for now, i put all the parts i have back on and took around the block and i was surprised at how quick and fun this bike is, lags tell just after 5k then takes off like crazy. im so happy, and my job interview i had today went well...

Motofool · January 19th, 2013, 07:16 PM

Two good news about transportation and income.

January 13th, 2013, 07:12 PM	#1
justin_ninja ninjette.org member Name: justin Location: beaverton or Join Date: Jan 2013 Motorcycle(s): 90 ninja 250 Posts: 10	carb issue. so i have cleaned the carbs the jets, and triple checked it all. my problem is that it will only idle about 3200 rpms and if i hit the gas too fast it will die or bog down. i just did valve adjustment on it and still same thing, also replaced the float needles and adjusted them to 17mm. i have the stock air box on it and stock exhaust and also new battery. i have messed with the air/fuel mixture and it is set at 2.5 turns. any ideas.................

January 13th, 2013, 07:26 PM	#2
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Are you sure that your diaphragms are undamaged and are responsive to changes of engine vacuum? __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

January 13th, 2013, 07:50 PM	#4
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Check this thread discussing a similar problem: http://www.ninjette.org/forums/showthread.php?t=121809 __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

January 17th, 2013, 06:39 AM	#7
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Check that enough fuel is reaching the carbs. It would be good to check the level inside the bowls. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

January 19th, 2013, 07:16 PM	#9
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Two good news about transportation and income. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

January 13th, 2013, 07:33 PM	#3
justin_ninja ninjette.org member Name: justin Location: beaverton or Join Date: Jan 2013 Motorcycle(s): 90 ninja 250 Posts: 10	The slide move and when I hit the gas they open. Or are u talking about the one on the side of the carb with the vacuum lines to it?

January 13th, 2013, 10:59 PM	#5
justin_ninja ninjette.org member Name: justin Location: beaverton or Join Date: Jan 2013 Motorcycle(s): 90 ninja 250 Posts: 10	looked it over and the only thing i can think of the air/fuel screws are not adjusted right. so tomorrow i will be looking over them and adjusting them to see if i can get it to run any better, anyone know if in out out to have more fuel ? i have to use choke to get it to start when its warm.

January 16th, 2013, 08:54 PM	#6
justin_ninja ninjette.org member Name: justin Location: beaverton or Join Date: Jan 2013 Motorcycle(s): 90 ninja 250 Posts: 10	ok so i have dipped the carbs and it runs great above 3k but when it goes down to idle just dies, i have messed with the a/f now out 3 1/4 turns and it kind of wants to idle about 2k if i hold the throttle. if i give it any gas it will jump to 4k and then stay there for a min then drop down little at a time to quiting... unless i blip the throttle then it will go up to 4k and back down slow and stall if i dont give it more gas. im going to say that the jets are clean and can see threw them. the ports are clean from what i can tell, i can blow air threw them and when i dripped water in there the jet goes it comes out where it should in the carb im at a loss for whats going on.. help...............

January 19th, 2013, 06:09 PM	#8
justin_ninja ninjette.org member Name: justin Location: beaverton or Join Date: Jan 2013 Motorcycle(s): 90 ninja 250 Posts: 10	ok good news............ so after checking the valves yesterday and doing a little adjusting and today i put the tank back on and started it, after a few mins it settled down to 2k good sign, so i messed with the sync and air/fuel screws and it settled down to 1500...so it is idling ok if u ask me for now, i put all the parts i have back on and took around the block and i was surprised at how quick and fun this bike is, lags tell just after 5k then takes off like crazy. im so happy, and my job interview i had today went well...

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