May 9th, 2013, 06:55 PM | #1 |
ninjette.org member
Name: Phil
Location: Aurora, ON, Canada
Join Date: Jan 2013 Motorcycle(s): 1987 Ninja 250 custom gold Posts: 218
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Some issues
Hi all,
Have got the bike together and tuned the idle mixture screws and its running great, revs up and back down better than ever! Except... It has been idling like crap. It is unsteady and constantly floating around 1000-1500 rpm. I sense a vacuum leak. The only thing that was a PITA to get back on the bike since the carb cleaning, was the boots from the air box. Since its the first rebuild since i owned the bike, i have noticed a bunch of things that are unplugged: 1. Coolant reservoir upper hose (Does this stay unplugged?): 2. This little filter looking thing, goes nowhere... The end of that yellow cylinder is the hose end. 3. The input to the hose looks like this on the top of the tank. Where do i route this hose? It keeps getting in the way of the seat keeps it slightly elevated, really annoying. 4. And finally, this hose that i circled in red, looks like there was a little clamp on the end there to hold that to a nipple: |
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May 9th, 2013, 08:10 PM | #2 |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
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First one goes all the way down as a drainage.
The rest, I cannot see what point the pics are referring to, since they are so close up.
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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 |
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May 10th, 2013, 02:52 AM | #3 | |
ninjette.org member
Name: Phil
Location: Aurora, ON, Canada
Join Date: Jan 2013 Motorcycle(s): 1987 Ninja 250 custom gold Posts: 218
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Quote:
The 2nd and 3rd go from the top of the tank to a filter type of thing to the right side of the battery and then nowhere... (the manual says it should go to a canister) Last one is bottom front of the airbox, next to the connection from airbox to the crankcase. |
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May 10th, 2013, 06:09 AM | #4 | |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
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Quote:
Maybe the yellow thing is a non-return valve for preventing fuel spills when the bike falls on its side. Just guessing here, not sure. Sorry, no idea about the last one. Where the other ends connects to? You are welcome PM sent.
__________________________________________________
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 |
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May 10th, 2013, 07:46 AM | #5 |
ninjette.org member
Name: J
Location: Dallas
Join Date: Aug 2012 Motorcycle(s): Ninja 250R '07 Posts: 81
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4th one looks like the airbox drain hose. It usually has a little plug on the end of it so it doesnt just freely leak despite the fact it hangs down with some other hoses.
You're supposed to unplug it every so often to let some liquid come out of it (usually oil or air filter oil) but I am not sure if it'd hurt to just leave it unplugged and hanging... |
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May 10th, 2013, 06:40 PM | #6 |
ninjette.org member
Name: Phil
Location: Aurora, ON, Canada
Join Date: Jan 2013 Motorcycle(s): 1987 Ninja 250 custom gold Posts: 218
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Looked up the hose coming out of the tank in the manual and it is suppose to go to a canister and recirculate the fuel. Unfortunately, the bike did not come with a canister and am left with an open hose...
However this does not explain the unsteady idle. The bike starts quick and runs well, besides the idle. I have already tuned the idle mixture screws and the bike revs up and settles well. |
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May 11th, 2013, 08:14 AM | #7 |
Aimless
Name: rory
Location: eau claire wi
Join Date: Feb 2013 Motorcycle(s): 01 ninja 250 Posts: 69
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If your carbs are clean like you say, then I would guess carbs out of sync. When was this checked last? Out of sync carbs result in a screwy idle.
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I just dropped in to see what condition my condition was in |
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May 11th, 2013, 09:09 AM | #8 |
ninjette.org member
Name: Phil
Location: Aurora, ON, Canada
Join Date: Jan 2013 Motorcycle(s): 1987 Ninja 250 custom gold Posts: 218
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Thats a good point, i did adjust the butterfly valve openings by eye, but i do need to do this checking vacuum to get a better reading.
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May 11th, 2013, 11:24 AM | #9 |
meh
Name: Joe
Location: SoCal
Join Date: Apr 2013 Motorcycle(s): 2002 EX250F Cafe/Streetfighter Project Posts: 60
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I see no ones suggested this yet, but have you tried this? I had kind of the same problem after my rejetting and tweaking that adjuster made everything alright. Also, have you checked valve clearances?
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May 11th, 2013, 01:10 PM | #10 |
Aimless
Name: rory
Location: eau claire wi
Join Date: Feb 2013 Motorcycle(s): 01 ninja 250 Posts: 69
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I have tested carbs I've set by eye, and they have usually been pretty off. Maybe I just have crumby eyes, but I always feel better properly syncing them.
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May 12th, 2013, 11:51 AM | #11 |
ninjette.org member
Name: Phil
Location: Aurora, ON, Canada
Join Date: Jan 2013 Motorcycle(s): 1987 Ninja 250 custom gold Posts: 218
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May 12th, 2013, 12:33 PM | #12 | |
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
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Quote:
__________________________________________________
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 |
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May 21st, 2013, 04:59 AM | #13 |
ninjette.org member
Name: Robert
Location: South of you blokes.
Join Date: May 2013 Motorcycle(s): '92 GPX 250 (Gone and replaced with '08 V-Strom), 2005 Suzuki C50. Posts: 186
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The air box drain being unplugged would be as good as a vacuum leak, you will also be getting unfiltered air into your engine.
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