September 8th, 2011, 12:04 AM | #1 |
ninjette.org newbie
Name: Mark
Location: Minnesota
Join Date: Sep 2011 Motorcycle(s): 07 250R Posts: 5
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07 ninja won't start
hey, I'm new to this forum and sort of new to bikes, been working on jeeps for awhile and got a ninja so thought this is the place to come
its an 07 250 with 1300 miles on it, i bought it with no key, took it to the locksmith, got a key, and it took quite a bit to drive it home. carb cleaner in intake, half choke, RPM's had to stay above about 5000 to stay running. drove it 11 miles home. the PO left it in his garage for probably 2 months and the gas went bad, but he did have the carbs cleaned about 6 months ago and said it was running very strong then. i drained the tank and put fresh gas in. right when i got it home it won't start at all. thought it was the carb but i pulled it out and cleaned it and put it back in, still won't start. checked the seals, they're good, boots are tight, ran carb cleaner through the gas line from the tank to the carb, have it hooked up to a jumper pack and the starter cranks all day no problem. got new plugs, old ones were very fouled. air coming out of exhaust smells like gas, and i have spark. when i pulled the carb off there was quite a bit of gas in there. |
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September 8th, 2011, 07:18 AM | #2 |
ninjette.org certified postwhore
Name: Jason
Location: Jacksonville, Florida
Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.
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Still sounds like a carb issue.
Maybe this can help... http://www.ninjette.org/forums/showthread.php?t=10298
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September 8th, 2011, 05:53 PM | #4 |
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when you tried to start it at home, did you fill the carb bowls first by sucking on the vaccum line attached to the petcock? it's NEVER going to start if there isn't gas in the carbs
*edit* how are you trying to start it btw? try beginning to crank with just a little (i repeat, little) throttle and no choke, then slowly turning the choke on. As it goes from lean to rich, it *should* fire */edit* |
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September 8th, 2011, 09:18 PM | #5 |
ninjette.org newbie
Name: Mark
Location: Minnesota
Join Date: Sep 2011 Motorcycle(s): 07 250R Posts: 5
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i tried putting the choke on all the way, turned the starter for about 5 seconds and gave it about half throttle and kept going from 0-50% throttle then when it didn't start i turned the choke half way and cranked the starter for another 25 seconds doing the same thing, then repeated with no choke. then back down to full choke.
i apologize, this is only my 2nd bike and i had the first one running for 3 weeks before i sold it. i did not suck on the vacuum line i suspect thats the one hooked up the the gas tank from below that isn't the fuel line? |
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September 10th, 2011, 07:25 PM | #6 |
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that's correct. the vaccum line on the petcock is the one that isn't the fuel line. But you cranked it long enough that it should have been pulling fuel into the carbs.
as a side note, be careful cranking your engine for that long. The starter motor will overheat and wear out |
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September 10th, 2011, 08:30 PM | #7 | |
ninjette.org newbie
Name: Mark
Location: Minnesota
Join Date: Sep 2011 Motorcycle(s): 07 250R Posts: 5
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Quote:
have the carb sitting on my work bench not sure exactly how to clean them though |
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September 10th, 2011, 11:43 PM | #8 |
total N00B
Name: Rob
Location: Toronto
Join Date: Oct 2010 Motorcycle(s): 2008 Kawasaki Ninja 250r Posts: 117
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hey...try this
http://www.ninjette.org/forums/showthread.php?t=65198 And if you think the carbs are clean enough...and like you said, plugs are good and everything is put back properly, it my be engine compression....I had that issue before. |
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September 11th, 2011, 12:02 AM | #9 | |
ninjette.org newbie
Name: Mark
Location: Minnesota
Join Date: Sep 2011 Motorcycle(s): 07 250R Posts: 5
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Quote:
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September 11th, 2011, 11:39 AM | #10 |
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http://faq.ninja250.org/wiki/Carburetor_photos
these are good carb pics. There's also a link to a good carb cleaning article on that page. An air compressor really makes cleaning the carbs easy |
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September 12th, 2011, 06:25 PM | #11 |
ninjette.org newbie
Name: Mark
Location: Minnesota
Join Date: Sep 2011 Motorcycle(s): 07 250R Posts: 5
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opened the carbs, pulled the main jet and primary jet or whatever and sprayed em with carb cleaner and used an air hose to spray em out. got a good beam of light through the jets, put it back together, no start.
confused now, doesn't even seem like it wants to start at all |
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September 12th, 2011, 07:22 PM | #12 |
ninjette.org sage
Name: Marc
Location: Crawfordville, Florida
Join Date: Jan 2010 Motorcycle(s): 2005 Suzuki S50, 2006 Kawasaki Ninja EX250F, 1990 Honda PC800, 2000 Yamaha TW200 Posts: 848
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You use the choke, maybe on half way this time of year, NO throttle. If it won't start in a few seconds, increase the choke a little more. You may be flooding it the way you are doing it.
Do not overdose the fuel in the tank with carb cleaner, only 1oz/gal of fuel, (2 at the max for an initial treatment of a really dirty carb) or the bike will run like crap or won't run at all. You don't dump carb cleaner into the intake and expect it to run. You also have 2 carbs and they have to be synchronized, which is another whole topic. It sounds like you are not very familiar with bikes and especially carbs so you may need either some more professional help or some serious reading before you start fixing things that may or may not be broken and making them worse. Gas two months old is probably still good, but changing it to fresh is not a bad idea. You have the petcock on RUN, not PRIME (is that on an '07)? Plugs gapped correctly? Can you pull one or both out and see if they are wet? I bet the engine is flooded. |
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September 29th, 2011, 05:32 PM | #13 |
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Name: Michael
Location: Victoria, Australia
Join Date: Sep 2011 Motorcycle(s): '97 ZZR250 Posts: 40
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Try the smaller things:
Spark plugs - replace Carbs - clean Battery recharge/replace. Then work from there |
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September 30th, 2011, 02:45 PM | #14 |
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Name: D
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In case you haven't already tried this, simultaneously spray starting ether directly into the intake with the air filter removed and crank with the choke off throttle wide open. See if the engine bites. If not, your spark isn't as good as you think.
Or you have a bad cylinder. Check your compression.
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