2010 Ninja gas leak finally spotted - help

Bob2010 · November 9th, 2013, 02:32 PM

Soo the thread or post I made a while ago about smelling gas , thought it was just the heat and the gas tank venting.....

Well it was 35-40* out last night when bringing the bikes to my other garage for storage. ( btw, my bike never ever ran this good in hot 90* weather, she actually pulled pretty hard, so i rode as much as i could before my hands went numb and my helmet filled with condensation )

When I got in, I was looking for a way to shut off the fuel and let the bowls run dry, or to empty them when I noticed this.
I didnt take the fairing off as it was pretty cold out but I got what I think is a pretty clear video , regardless of the fact i held my camera phone in the key-hole mode.

Only mods in that area was a stage 2 ? jet kit when the bike was brand new

what do you guys think?

the left carb shows signs that it was doing this for some time, while the right side is perfectly clean

Link to original page on YouTube.

genosr1 · November 9th, 2013, 03:06 PM

thats your fuel screw, there is a spring, a washer and an o-ring under it, you need to replace the o-ring they are difficult to get out, take a piece of saftey wire and bend a small hook in it and go fishing, it may have even been left out on installation of your jet kit

red5 · November 9th, 2013, 03:59 PM

I don't think its the pilot screw (fuel screw as he said) The caps are still in place so it has probably never been touched.

I bet its the bowl o-ring. Fuel is just collecting on the screw housing because that's the lowest point on the carb.

Not hard to replace. <$10 here

jkv45 · November 9th, 2013, 07:16 PM

Not sure about the leaking issue, but if it runs better in cold weather than in hot weather your jetting is too rich.

Bob2010 · January 21st, 2014, 09:12 PM

Mini update. Checked the bikes out. Battery tenders still going strong. We had 2 polar vortices come through buffalo with -30F windchills.
Too cold to work in a non-heated garage.

I never thought I had a problem with the jetting as it was done at the dealer before I bought it. I would imagine any engine would love a blast of cold, dense air from time to time
It's my wife bike that has me worried. It's stock except for a yoshi slip-on.
Even before the slip-on, it was a bitch to ride.
Takes too long to warm up (no throttle response , chokes and sometimes dies)
Power surges and stupid quirks.

Was thinking maybe it's cause she rArely rides it ; once every 2 weeks maybe?

As soon as it warms up , id like to get the fairings off and look at my leak and see what I can do about hers
The seller gave me washers for the slip-on, said he used 2 on each side.
I'll see how that goes.

November 9th, 2013, 02:32 PM	#1
Bob2010 ninjette.org sage Name: Bob Location: NY Join Date: Jul 2012 Motorcycle(s): 2010 Ninja 250 2009 Ninja 250 Posts: 730	2010 Ninja gas leak finally spotted - help Soo the thread or post I made a while ago about smelling gas , thought it was just the heat and the gas tank venting..... Well it was 35-40* out last night when bringing the bikes to my other garage for storage. ( btw, my bike never ever ran this good in hot 90 weather, she actually pulled pretty hard, so i rode as much as i could before my hands went numb and my helmet filled with condensation* ) When I got in, I was looking for a way to shut off the fuel and let the bowls run dry, or to empty them when I noticed this. I didnt take the fairing off as it was pretty cold out but I got what I think is a pretty clear video , regardless of the fact i held my camera phone in the key-hole mode. Only mods in that area was a stage 2 ? jet kit when the bike was brand new what do you guys think? the left carb shows signs that it was doing this for some time, while the right side is perfectly clean Link to original page on YouTube. __________________________________________________ 2010 Red Ninja 250 2009 Black Ninja 250 -If you ride like lightning,you're gonna crash like thunder-

November 9th, 2013, 03:59 PM	#3
red5 ninjette.org guru Name: Chris Location: Chattanooga Join Date: May 2012 Motorcycle(s): 09 ninja 15.256 Posts: 263	I don't think its the pilot screw (fuel screw as he said) The caps are still in place so it has probably never been touched. I bet its the bowl o-ring. Fuel is just collecting on the screw housing because that's the lowest point on the carb. Not hard to replace. <$10 here __________________________________________________ "We're not always doing business, but we're always open." "For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." Carl Sagan

January 21st, 2014, 09:12 PM	#5
Bob2010 ninjette.org sage Name: Bob Location: NY Join Date: Jul 2012 Motorcycle(s): 2010 Ninja 250 2009 Ninja 250 Posts: 730	Mini update. Checked the bikes out. Battery tenders still going strong. We had 2 polar vortices come through buffalo with -30F windchills. Too cold to work in a non-heated garage. I never thought I had a problem with the jetting as it was done at the dealer before I bought it. I would imagine any engine would love a blast of cold, dense air from time to time It's my wife bike that has me worried. It's stock except for a yoshi slip-on. Even before the slip-on, it was a bitch to ride. Takes too long to warm up (no throttle response , chokes and sometimes dies) Power surges and stupid quirks. Was thinking maybe it's cause she rArely rides it ; once every 2 weeks maybe? As soon as it warms up , id like to get the fairings off and look at my leak and see what I can do about hers The seller gave me washers for the slip-on, said he used 2 on each side. I'll see how that goes. __________________________________________________ 2010 Red Ninja 250 2009 Black Ninja 250 -If you ride like lightning,you're gonna crash like thunder-

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November 9th, 2013, 03:06 PM	#2
genosr1 ninjette.org member Name: geno Location: granite city Join Date: Oct 2013 Motorcycle(s): gsxr 750, sv650, 250 ninja Posts: 110	thats your fuel screw, there is a spring, a washer and an o-ring under it, you need to replace the o-ring they are difficult to get out, take a piece of saftey wire and bend a small hook in it and go fishing, it may have even been left out on installation of your jet kit

November 9th, 2013, 07:16 PM	#4
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	Not sure about the leaking issue, but if it runs better in cold weather than in hot weather your jetting is too rich.