• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

250 ninja help!!

  • Thread starter Thread starter spots25
  • Start date Start date
S

spots25

Guest
Okay, so its not a GS, but you guys are awesome, and any pointers are helpful. I got a 03 250 ninja the other day to ride while the GS was in construction, and it won't idle off choke. I cleaned out the carbs and it didn't change. It also won't rev when the choke is partially on like it should. It really feels like the idle mixture screws aren't letting enough fuel in, but I have them turned back to baseline and it doesn't help. Any suggestions?

Thanks
 
8-[ those carbs have to be surgically clean !!! the pilots are so small you can't hardly see through them when they are clean . the main jet tubes {emulsion} have to be spotless as well . any dirt at all will render the 250 ninja dead in the water .
I have had brand new 250 ninja'sout of the crate that needed a carb clean :shock:
 
Yeah I second the advice to make sure the insides of the carbs are spotless, use compressed air if you can. In my experience with the 250 ninja the engine has to be hot before it likes to rev as well
 
earlier today I took the idle mixture screws out and sprayed carb cleaner in them. After the first one, there was no change. After the second, it wouldn't start, and black flakes starting coming out of the exhaust. I tried pulling the idle mixture screw out again and a chuck of black flake was in the spring. I guess I'll have to take them out again :cry:
 
Spray carb cleaner is intended to be sprayed through the passageways on a carb after it has been disassembled and all the plastic and rubber parts removed. I dont know of any spray carb cleaner that does not dissolve rubber seals/parts and plastic.

Earl
 
earlfor said:
Spray carb cleaner is intended to be sprayed through the passageways on a carb after it has been disassembled and all the plastic and rubber parts removed. I dont know of any spray carb cleaner that does not dissolve rubber seals/parts and plastic.

Earl
Click to expand...

If it sits on the rubber or plastic then yes, it will dissolve them, but a quick spray normally doesn't hurt. I learned the hard way, that master cylinder really didn't need a new plunger when I started.......

Those carbs need to be thoroghly disassembled and cleaned and verify that the tank is clean as well as the petcock filter if so equipped. Compressed air and fishing line will help clean the tiny ports.
 
earlfor said:
Spray carb cleaner is intended to be sprayed through the passageways on a carb after it has been disassembled and all the plastic and rubber parts removed. I dont know of any spray carb cleaner that does not dissolve rubber seals/parts and plastic.

Earl
Click to expand...

From what I've read on the directions. Carb cleaner can be used in two ways. One is to be used when cleaning carb parts while they're disassembled. The second is to use it as a quick fix and to fog the carbs while the bike is running in order to clean up any residue.

Brad bt
 
spots25 said:
earlier today I took the idle mixture screws out and sprayed carb cleaner in them. After the first one, there was no change. After the second, it wouldn't start, and black flakes starting coming out of the exhaust. I tried pulling the idle mixture screw out again and a chuck of black flake was in the spring. I guess I'll have to take them out again :cry:
Click to expand...

that black flake in the mixture screw spring is most likeley damaged o-ring :shock: the mixture screws have a spring , metal washer , and o-ring inside the carb . if they are damaged pieces of the o-ring can plug up the carb and leak air as well . in either case the 250 ninja will not run worth crap 8-[
 
U.P.dragracer said:
that black flake in the mixture screw spring is most likeley damaged o-ring :shock: the mixture screws have a spring , metal washer , and o-ring inside the carb . if they are damaged pieces of the o-ring can plug up the carb and leak air as well . in either case the 250 ninja will not run worth crap 8-[
Click to expand...


hmmm... i never got an o-ring out of the hole the first time. I hope thats not the case, but I guess i'll look more closely this time around... if there was an oring hiding way back there, how would I get it out?
 
earlfor said:
Spray carb cleaner is intended to be sprayed through the passageways on a carb after it has been disassembled and all the plastic and rubber parts removed. I dont know of any spray carb cleaner that does not dissolve rubber seals/parts and plastic.

Earl
Click to expand...


Seafoam Deep Creep - cleans carbs and lubricates rubber
 
spots25 said:
hmmm... i never got an o-ring out of the hole the first time. I hope thats not the case, but I guess i'll look more closely this time around... if there was an oring hiding way back there, how would I get it out?
Click to expand...

Dental pick, stiff wire with a small bend in the end, or a toothpick.
 
spots25 said:
hmmm... i never got an o-ring out of the hole the first time. I hope thats not the case, but I guess i'll look more closely this time around... if there was an oring hiding way back there, how would I get it out?
Click to expand...

I use the carb spray tube LOL get it in just right and it will blow the o-ring out and it will slide right down the tube so you don't lose it . don't forget the metal washer when you put it back together .

screw, spring , metal washer , o-ring insert into carb 8-[
 
wow, i'm a little embarrased. I've never taken apart this kind of carb before, and never bothered thinking or looking in any sort of repair manual, but out of the 2 carbs, I only had 1 oring and no washers :lol: I feel really dumb, but I guess I assumed since none came out that there wasn't any.

I guess I'll get them tomorrow, since by some unknown law, NO motorcycle shop in the world is open on monday
 
That actually came from the days of factory-sponsored races. The races are held on Sunday, and Monday was used for repairing the bikes and recuperating. Not many dealerships still sponsor racers, but the tradition has carried over.

As for those parts, it's unlikely you'll be able to buy those pieces seperately. Chances are you'll have to buy the entire carb rebuild kit, and even then it may not come with washers. You might check out www.bikebandit.com and see if they sell the pieces individually. They have good exploded diagrams which can also be helpful. You might try to find comparable washers at an auto parts store, but you have to make sure it's the exact size and rated for gasoline. The washers may be tricky to find, but you may get lucky.
 
we always had the o-rings and washers in stock . you can get them from suppliers like K&L , radio shack has nice little washers and stuff as well . some of the hobby stores who do a lot of RC cars and stuff might have it as well \\:D/
 
I ordered up some new orings and washers (needles and springs too, came as a kit) and adjusted the valves. Put it all back together, and it was very hard to start. I eventually push started it, and it ran great other than dieing when I tried to drop idle below 2k. Whatever, I let it run at 2k for half an hour, and went to work. Today, it won't start for anything. It just won't. So

1. clean carbs
2. adjusted valves
3. gas in float bowls
4. have spark

Why doesn't it run? Why oh why?!?!?

thanks
 
Check compression. You said in a earlier post that there was black flakes coming out of the exhaust, maybe the valves are contaminated. Did you have to make any adjustments when you checked the valves?
 
You must log in or register to reply here.
Back
Top