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Old September 29th, 2011, 07:59 PM   #41
ScorpionNinja
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I think I'm having this problem right now on my 2009, with 13,000 miles on it. 100% STOCK!

But, I took off the carbs and took out both Pilot jets and both Main jets. ALL Jets are clean and i can see through the holes plain as day when held up in the sunlight outside!
I kinda blew out the carbs, I wasnt sure where to blow in/out with the air compressor, so i dunno if i got rid of any blockages!

-I drained all old gas (5-6month old gas with Sta-bil added last Fall). Gas tank now has 1 gallon of FRESH GAS. ***BEFORE I TOOK OFF CARBS I TRIED FRESH NEW GAS***

-The Carbs are clean, inside and out. I DIDNT have to clean them, but shot some carb cleaner into holes and areas that i figured. the float bowls area, no buildup anywhere, DIDNT need cleaning.

-The Diaphragms work like that diy video. smooth return/etc.

-I cannot see anything cracked or wrong with ANY of the gas/vacuum lines.

-Air filter is just fine too, NOT all dirty.

-When I move the carbs butterfly flappers open/closed, they seem to be very much (to my eyes) equally opening and closing. So "carb sync'ing" shouldnt be needed.

Anyother ideas?

Mind you, ATM the bike is still apart, so I havent put it all back together yet... until I figure out why.
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Old September 29th, 2011, 08:28 PM   #42
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What's your starting procedure? Battery health?
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Old September 29th, 2011, 08:41 PM   #43
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Sorry, I mis posted this.

I meant that Im having the same issues as Blackwidow "My Baby is Sick..." thread.

Battery is fully charge. Choke Fully Down/On.

Im just looking for ideas for if it IS the carbs, Ive cleaned them good (so I think) and I cant see anything wrong or clogged with them. Before I put everything back together and test start/run the bike again. I dont wanna waste time if i put it all back together and bike still runs crappy and have to take it all apart again.

Let me copy/paste a THREAD from my motorcycle clubs website. No one on there has exp with 250Rs.

brb.....
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Old September 29th, 2011, 08:45 PM   #44
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My 250R wont run correct...

Tonite, i went out and tried to Start my 250R. Heres the story or play by play to give you an idea to form your 2cents...

Its a Carb'ed 249cc parrell twin engine.

It havent rode it, or started it since May 2011.

Last year when I winterized it (Nov.1st 2010), I used 4 gallons of FRESH GAS. Added correct amount of Sta-bil.

I pulled the Battery and kept it inside the house and plugged in the Tender Once a Month, over this Winter.

This May I started it up, took awhile, a few tries, but I was able to get it running and take it for a Ride. 210 miles over 3 hours, then got home and Parked it!

So tell me what you think of me doing this...



Ill update this, but please share your exp with Any Helpful info.

Last futzed with by ScorpionNinja; October 6th, 2011 at 01:35 PM.
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Old September 29th, 2011, 08:46 PM   #45
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The bike idles and runs. crappy but it does. When i slightly close choke, it dies. If i blip the throttle, it dies. If i slowly give it throttle, it dies.
The idle speed is set correct @ 1,250-1,500 RPMs.

I put in new correct type NGK spark plugs during winterizing last year. So they have 210 miles on them.

Ive let it sit for 4 mins at 1500 RPM idle... then as above, as soon as I give little throttle, or slowly close choke off, it DIES.

Ive been in touch with some of the 250R fourm members that I used to hang with, so far no replies!
Its either just Old-bad gas (Im gonna start trying as my OP) or its gummed carb's.

Battery has plenty of power. Ive sat there and cranked it some 20x in a row. 3 sec cranks at a time, to finally get the bike to IDLE without dying, but choke must be closed fully. As soon as you open choke, or give some thottle.. it DIES!
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Old September 29th, 2011, 08:48 PM   #46
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I drained all OLD GAS, and put in 1 gallon of FRESH GAS, before removing carbs and taking **** apart.

Bike STILL acts the same as above troubleshooting!
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Old September 29th, 2011, 08:53 PM   #47
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*** THIS IS A COPY OF MY POST AT A DIFFERENT THREAD/WEBSITE***

I just was outside and Yes... I siphoned the old gas out (2 gallons worth) Its Yellowish LOL. Old Gas is out (as much as I can siphon out) I put in 4 oz. of GUMOUT carb cleaner gas additive and 1 gallon of FRESH GAS. (I figured id ride up to the gas station and top off with 3 more gallons of FRESH GAS.

Well... The bike starts up ok, but as soon as I slowly close CHOKE, It Dies or wants to die! I kept it at IDLE, then slowly gave it more gas, and Held RPMs @ 4k. Then while holding it @ 4k RPMs, I slowly closed CHOKE....held RPMs @ 4k. Did this for 3mins, then slowly let off throttle, it almost idled at 1,500RPM, but after 10 secs... it died.

I kept doing this for 10 mins, then was able to hold RPMs @ 4k, Choke OPEN and rode around the block. But as soon as I slowed down to turn into driveway, I lowered throttle as I downshifted back into 1st gear, it DIED!

I cant take it for a full ride, until I put the plastics all back on, but I wondered what does all this sound to you guys?

Last futzed with by ScorpionNinja; October 6th, 2011 at 01:34 PM.
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Old October 8th, 2011, 08:40 AM   #48
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Can anyone help restore the OP? I miss kkim.
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Old October 10th, 2011, 04:29 PM   #49
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Well so after talking to a fellow member of my Club, he thinks that my carb issue is like his wifes 08 250Rs problem this spring.

Its a clogged Idle jet?

Theres 3 types of jets? I thought there was just the (2) Main jets and (2) Pilot jets?

He said to run seafoam through the fuel system and ride the **** outta it on the highway and it should clean out itself.

I already took off and cleaned the carbs, they looked Clean before I even cleaned/blew them off/out. Im still having the same issue of turning Choke off, it dies no matter how long the bike has warmed up.
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Old October 16th, 2011, 01:45 PM   #50
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You need to physically remove the idle mixture needles, and blow all the passages out with solvent and compressed air. If it won't idle and the needles are set around 2.5 turns out from bottomed, then the idle passages are blocked with varnish and old fuel residue. Nothing you put in the tank is going to help you with that.
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Old June 9th, 2012, 09:08 AM   #51
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Quote:
Originally Posted by ScorpionNinja View Post
The bike idles and runs. crappy but it does. When i slightly close choke, it dies. If i blip the throttle, it dies. If i slowly give it throttle, it dies.
The idle speed is set correct @ 1,250-1,500 RPMs!

Proper idle speed is 1250 +/-
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Old June 9th, 2012, 10:11 AM   #52
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I just found out that I'm going to have to put the jets in the carbs on my recent EX250F purchase. They are supposed to be in the box of parts I received with it but I don't even know what they look like. Let me just reiterate this:
Quote:
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Can anyone help restore the OP? I miss kkim.
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Old June 9th, 2012, 09:45 PM   #53
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Um... What's OP ? <<<<Noob

Quote:
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I just found out that I'm going to have to put the jets in the carbs on my recent EX250F purchase. They are supposed to be in the box of parts I received with it but I don't even know what they look like. Let me just reiterate this:
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Old June 10th, 2012, 02:47 PM   #54
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Quote:
Originally Posted by trixter View Post
OP - Original Poster the person who started a particular thread, in this case that is kkim who left the forums a while back
Also "Original Post." There was a concerted effort to make new images for all the @kkim guides and DIYs. No one touched this one.
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Old September 11th, 2014, 08:34 AM   #55
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Is there any other comparable guides that has pictures? I need to do a carb clean.
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Old September 11th, 2014, 10:02 AM   #56
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Is there any other comparable guides that has pictures? I need to do a carb clean.
This section has a ton of carb-related info - http://faq.ninja250.org/wiki/Intake
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Old November 27th, 2014, 10:00 AM   #57
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Need help.

I am winterizing my newly purchased used 08 ninja.
Had hesitation at 4-5k RPM on 25-50% throttle and sometimes would stall when given 100% throttle off of idle.
From what I read online, likely had dirty carbs so took it out and cleaned it.

So I was all excited and everything putting it back into the bike to test how the carbs run after to find that the entire electrical system does not work when turned ignition to the on position. Not getting any light on the dash 98%. I tried over and over random things, looked at the fuse box and nothing.
On 2 random occasions, when key turned to 'on' the dash light/neutral/engine light appeared but when i hit the ignition button, everything dies and I revert to a state of nervous breakdown where the electrical system does not turn on anymore for a unforseen period of time no matter what I do.

Battery was on a tender since it was removed and checked to be > 12 V.
Didnt touch the electrical system, except disconnecting fairing signal lights, tank fuel gauge sensor and front headlights.

Anyone have experience with this and have any suggestions on whats my next step?
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Old November 27th, 2014, 11:30 AM   #58
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Where did you sit your battery when doing the work? It honestly sounds like your battery is gone. ie... fails under load. I would start there.
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Old November 27th, 2014, 07:31 PM   #59
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Need help.

On 2 random occasions, when key turned to 'on' the dash light/neutral/engine light appeared but when i hit the ignition button, everything dies and I revert to a state of nervous breakdown where the electrical system does not turn on anymore for a unforseen period of time no matter what I do.

Battery was on a tender since it was removed and checked to be > 12 V.
Didnt touch the electrical system, except disconnecting fairing signal lights, tank fuel gauge sensor and front headlights.

Anyone have experience with this and have any suggestions on whats my next step?
Sounds like the battery just gave up to me too. If you are getting 12.0V you are only at 50% charged. 100% is about 12.7V. Doesn't seem like much difference, but it is.

At times a Tender will show "Full Charge" and the battery may even show 12.7V, but as soon as there's a load (hitting the button) it will drop off to nothing.

That sounds like what yours is doing.
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Old February 22nd, 2015, 10:35 AM   #60
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Thanks so much for the replies!
Its a Great community here. will be trying this out soon.
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Old April 8th, 2017, 10:40 AM   #61
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The pictures are gone!! HELP LOL
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Old April 8th, 2017, 11:01 AM   #62
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The pictures are gone!! HELP LOL
The original poster has long been gone and he took the pics with him. Sorry.
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Old July 9th, 2017, 02:56 AM   #63
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Hi guys... I haven't used my bike for a few months and now it won't idle if I turn off the choke. How can I fix this???? Can someone help me???... PLEEEEZE??!!

How many times have we read this on the forum? If the bike was running fine the last time you rode it and it's been a few months since then, the gas in the carbs may be the problem and could be gumming up your jets.

There are a few remedies such as a fuel cleaner/additive (seafoam, berryman's) that you might be able to get by with that will clean the clogged jets, if you're lucky, but if not, removing the carbs and cleaning out the jets is the only way to be 100% sure your jets are clean and crud free.

I haven't ridden the Ninja since last May and knew the jets were clogged. The bike would idle rough when started with the choke and when I turned off the choke, the bike idled really rough and no amount of playing with the idle speed knob would give me a nice steady idle once the bike was warmed up.

So, today I decided to clean my carbs.

This is how I did mine... your procedure may vary, but ultimately you want to get to the inside of the carbs, remove the pilot jets and clean them out.

First step, put the bike up on a rear stand...
http://www.ninjette.org/forums/showthread.php?t=9810

Next, remove the bodywork...
http://www.ninjette.org/forums/showthread.php?t=9933

and then the gas tank...
http://www.ninjette.org/forums/showthread.php?t=10191

then, remove the carbs...
http://www.ninjette.org/forums/showthread.php?t=44330

At this point your bike should look like this...




parts removed and safely tucked away in a corner...


Find a clean working area and flip the carbs upside down and remove the float bowls. I use a JIS screwdriver on these screws and have no problems with stripped out screws. I highly recommend you purchase a set if you work on your bike a lot.


The pilot jets are in these "towers" at the bottom of the carb. Use a suitable screwdriver that fit the jets well as they are made of brass and deform easily if you use a loose fitting screwdriver blade.


once removed, this is what the pilot jets look like...


Sorry for the blurry pics, but I was trying to show that my pilot jets were blocked solid. If you hold them up to the light, you should be able to see a perfectly round hole when looking through the jet. As you can see, no light is visible in this jet.


Blast through the jet with compressed air with a nozzle attachment...


and the result after blasting it with compressed air... as you can see, there's light coming through the jet now. When clean, you should be able to see a nice round hole of light. The pilot jet hole is very small, so they tend to clog up very easily, which leads to hard starting.


I checked the main jets just because I was in there. Again, use a suitable size screwdriver to remove the main jets.


Main jets required no cleaning...


Reinstall the main jets, pilot jets and carb bowls.






Reinstall the carbs, air filter and gas tank and start bike up to check your work. If bike runs to your satisfaction, put the bodywork back on.

Hope this helps some of you when you go to start your bike after it's winter hibernation. If you didn't prep your bike before putting it away for winter, I can almost guaranty you'll be doing this jet cleaning come spring time.
what happened to the pictures?
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Old July 9th, 2017, 04:47 AM   #64
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what happened to the pictures?
Kkim has left the forum a while ago. Likely he had his photos hosted here, so the embeding reference links aren't valid if the photos are no longer in the referenced places.
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Old July 9th, 2017, 04:49 AM   #65
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Kkim has left the forum a while ago. Likely he had his photos hosted here, so the embeding reference links aren't valid if the photos are no longer in the referenced places.
he has hundreds like this
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Old July 9th, 2017, 04:55 AM   #66
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he has hundreds like this
Like I said... he left the forum, deleted his photos and cleared out his profile.

The reference links in the photo embedding text are still looking for those photos (which were likely hosted by this site) in places where there are no longer photos because they were deleted when he cleared out his profile. This is what gives the error you see. Basically the website is following a link that doesn't have anything in it anymore.

So... none of his photos are going to show up anymore unless other users had them saved before he left and Big Alex was able to embed the copies into the thread.
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Old July 9th, 2017, 05:13 AM   #67
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Originally Posted by choneofakind View Post
Like I said... he left the forum, deleted his photos and cleared out his profile.

The reference links in the photo embedding text are still looking for those photos (which were likely hosted by this site) in places where there are no longer photos because they were deleted when he cleared out his profile. This is what gives the error you see. Basically the website is following a link that doesn't have anything in it anymore.

So... none of his photos are going to show up anymore unless other users had them saved before he left and Big Alex was able to embed the copies into the thread.
thanx for reply. bummers
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Old July 29th, 2018, 04:03 PM   #68
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Did anyone happen to back these photo's up? I need to go through this on my bike, and I can't get the photo's to load. Pictures make it a lot more straightforward.
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Old January 19th, 2023, 01:16 AM   #69
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By the way, the picture links (the pics in the thread, not the threads that are linked) in the original thread.
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Old January 19th, 2023, 01:31 AM   #70
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many like me used photo studio to post pics. there membership went crazy so i dropped em. lots of my pics still show but photo studio written thru pic
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Old February 3rd, 2023, 03:36 PM   #71
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If you run oil in your gas, you won't ever have to clean the carbs. Bike was sitting for months in winter, took 10 seconds of cranking but fired right up. Old trick I found out myself but I read this has been used by old timers for a while, specifically by pouring it down the fuel lines going to carbs and then just putting the machine back into action with straight gas. I elect to just run oil with fuel and never have to worry about a corroded gummed up carb. It also serves as an upper cylinder lubricant and fogging oil while in use. Can't recommend this enough. I use waste motor oil and haven't found a negative yet.
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Old February 3rd, 2023, 08:19 PM   #72
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This Picture really helped me clean my carbs where they were at least working for a little while... then a month or so ago I sent the carbs to Gordon and had him fix them !
these are very hard carburators to clean.... it seems that the passage ways are so small that compressed air doesn't do much at all I used a carburator brush and probe cleaning kit to clean them out the best I could and then made sure I had carb cleaner exiting all 4
points on the pilot circuit.... that took some doing ! it wasn't just a poke and spray affair i had to poke and use a thin stainless steel cable down the holes and work it around to get the blockage out ... doing that completely plugged one of the 4 passage ways completely, but I finally got it clear too.... put them back together and it ran fairly good so I ran it like that for a year.... but it still wasn't right and I could tell so I sent them to Ducattiman (Gordon) and had him fix the carbs and he found several things amiss like the wrong jets and a plugged pilot jet....even after all my hard work...
so he is very good at what he does save your self the problem and let a pro fix them for you...that's what I did and I am glad I did !
...
Bob........
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Bike Won't Idle below ~2500rpm wsrussell7 2008 - 2012 Ninja 250R Tech Talk 15 May 14th, 2013 06:05 PM
Bike won't idle! Halp plox! SemperFudge 1986 - 2007 Ninja 250R Tech Talk 24 September 29th, 2012 09:09 AM
Won't "run right", won't idle, choke only, etc?? - SOLUTION HERE Jiggyfly 2008 - 2012 Ninja 250R Tech Talk 5 May 16th, 2012 09:50 AM
Ninjette suddenly won't idle/run properly... infinitethrill 2008 - 2012 Ninja 250R Tech Talk 29 April 15th, 2012 02:03 PM
Changed plugs, bike won't idle.. pixelpete 1986 - 2007 Ninja 250R Tech Talk 9 April 20th, 2010 11:22 AM


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