Gas coming out of overflow tube. Engine not starting.

BearZ · September 23rd, 2014, 05:18 PM

Hey y'all. I'm having bit of an issue with my ninjette. I changed the oil on Sunday and everything seemed fine until Monday when I got back home from work I smelled gasoline fumes. I went to the garage and there was a puddle of gasoline under the bike. I investigated and found that there was gas coming out of the overflow tube. I figured it was caused by me accidentally flooding the engine. I took the oil out and the overflow stopped letting out gas. I found that there was gasoline mixed into the oil (I didn't mix it, obviously) I took all the oil/gas out but left the new filter in. Replaced it with brand new oil and now the bike won't start again and there is gas coming out of the overflow. What's wrong with my bike? What can I do to fix it? Any help is appreciated. Thanks.

Aodrn · September 23rd, 2014, 07:49 PM

Im making a guess, but it sounds like a stuck open float on the carb. It overflows and goes through the valves and into the cylinder. Then into the crankcase. The oil change sounds like a coincidental thing.

BearZ · September 23rd, 2014, 08:02 PM

Quote:

Originally Posted by Aodrn

Im making a guess, but it sounds like a stuck open float on the carb. It overflows and goes through the valves and into the cylinder. Then into the crankcase. The oil change sounds like a coincidental thing.

That's what I've gathered after a bit of reaearch. How do I go about fixing the issue?

Aodrn · September 23rd, 2014, 08:06 PM

Most likely, it is some crap on the float needle. Regardless, I would take the carbs and clean them out. I wouldn't think it was a bad needle, but its possible.

BearZ · September 24th, 2014, 05:31 AM

Quote:

Originally Posted by Aodrn

Most likely, it is some crap on the float needle. Regardless, I would take the carbs and clean them out. I wouldn't think it was a bad needle, but its possible.

It's a 2012 with just over 3500 miles on it, it shouldn't be breaking down at all...

Anyway, I looked around the site and most of the DIY carb removing/cleaning threads are way out of date. All of them are missing photos. I watched a video but it didn't help much. I don't want to break stuff further.

BlownWideOpen · September 24th, 2014, 05:46 AM

Then take it to a technician, it's not going to fix itself!

Aodrn · September 24th, 2014, 10:31 AM

with 3500 miles I would not expect any actual damage. It has to be some sort of dirt on the float needle. Just familiarize yourself with the basic parts of a carburetor and it is very easy to clean that part out.just dropped the fuel bowl pull that float needle out and blow a crapload of carb cleaner in there.download a shop manual and it will instructions on how to remove the carburetors.

InvisiBill · September 25th, 2014, 11:23 AM

You can try draining the bowls and letting them fill back up (a few times if needed) to try to flush anything out of the valve. You can also try dumping some SeaFoam or another cleaner directly down the fuel line to the carb.

If you can't flush it out, you (or someone you pay) will need to pull the carbs and check it out.

If it sat for a while, the rubber could've deteriorated, leading to a bad seal or debris from something upstream. I wouldn't expect major problems on something that new, but it's possible some small things might need to be replaced, depending on the exact conditions the bike has lived in.

cuong-nutz · September 25th, 2014, 12:06 PM

Swing by my place and I'll show you. I have to pull the carbs again and redo my jetting back to stock since I switched back to the stocker exhaust system.

BearZ · September 25th, 2014, 04:12 PM

Thanks for the help. There is a shop in front of my work that does this sort of thing all day. I went and had a chat with them and I'm going to take my 250 in on Saturday and have them take a look at it. I am going to ask my boss if I can borrow the company Van and trailer on Friday so I can move my bike.

Alex · October 11th, 2014, 06:45 PM

Did it get sorted?

BearZ · October 11th, 2014, 07:53 PM

Yes it was resolved. I took it to a shop and they fixed it. There was gas in the cylinders.

September 23rd, 2014, 05:18 PM	#1
BearZ ninjette.org member Name: Zubair Location: Houston Join Date: Aug 2012 Motorcycle(s): 2012 Kawasaki Ninja 250R Posts: 34	Gas coming out of overflow tube. Engine not starting. Hey y'all. I'm having bit of an issue with my ninjette. I changed the oil on Sunday and everything seemed fine until Monday when I got back home from work I smelled gasoline fumes. I went to the garage and there was a puddle of gasoline under the bike. I investigated and found that there was gas coming out of the overflow tube. I figured it was caused by me accidentally flooding the engine. I took the oil out and the overflow stopped letting out gas. I found that there was gasoline mixed into the oil (I didn't mix it, obviously) I took all the oil/gas out but left the new filter in. Replaced it with brand new oil and now the bike won't start again and there is gas coming out of the overflow. What's wrong with my bike? What can I do to fix it? Any help is appreciated. Thanks.

September 23rd, 2014, 07:49 PM	#2
Aodrn It's a long boring story Name: Ryan Location: St. Louis Join Date: Jul 2013 Motorcycle(s): 2012 Ninja 250 Posts: 167	Im making a guess, but it sounds like a stuck open float on the carb. It overflows and goes through the valves and into the cylinder. Then into the crankcase. The oil change sounds like a coincidental thing. __________________________________________________ #41 MCRA alex.s :crashing is a normal part of life... people are just in denial about that.

September 23rd, 2014, 08:06 PM	#4
Aodrn It's a long boring story Name: Ryan Location: St. Louis Join Date: Jul 2013 Motorcycle(s): 2012 Ninja 250 Posts: 167	Most likely, it is some crap on the float needle. Regardless, I would take the carbs and clean them out. I wouldn't think it was a bad needle, but its possible. __________________________________________________ #41 MCRA alex.s :crashing is a normal part of life... people are just in denial about that.

September 24th, 2014, 05:46 AM	#6
BlownWideOpen ninjette.org guru Name: Artie Location: Canada Join Date: Mar 2013 Motorcycle(s): Stuff Posts: 284	Then take it to a technician, it's not going to fix itself! __________________________________________________ Paint side up, rubber side down!

September 24th, 2014, 10:31 AM	#7
Aodrn It's a long boring story Name: Ryan Location: St. Louis Join Date: Jul 2013 Motorcycle(s): 2012 Ninja 250 Posts: 167	with 3500 miles I would not expect any actual damage. It has to be some sort of dirt on the float needle. Just familiarize yourself with the basic parts of a carburetor and it is very easy to clean that part out.just dropped the fuel bowl pull that float needle out and blow a crapload of carb cleaner in there.download a shop manual and it will instructions on how to remove the carburetors. __________________________________________________ #41 MCRA alex.s :crashing is a normal part of life... people are just in denial about that.

September 25th, 2014, 11:23 AM	#8
InvisiBill EX500 full of EX250 parts Name: Bill Location: Grand Rapids-ish, MI Join Date: Jul 2012 Motorcycle(s): '18 Ninja 400 • '09 Ninja 500R (selling) • '98 VFR800 (project) • '85 Vulcan VN700 (sold) Posts: A lot. Blog Entries: 1 MOTM - Aug '15	You can try draining the bowls and letting them fill back up (a few times if needed) to try to flush anything out of the valve. You can also try dumping some SeaFoam or another cleaner directly down the fuel line to the carb. If you can't flush it out, you (or someone you pay) will need to pull the carbs and check it out. If it sat for a while, the rubber could've deteriorated, leading to a bad seal or debris from something upstream. I wouldn't expect major problems on something that new, but it's possible some small things might need to be replaced, depending on the exact conditions the bike has lived in. __________________________________________________ * Unregistered, I'm not your mom and I'm not paying for your parts, so do whatever you want with your own bike. *

September 25th, 2014, 12:06 PM	#9
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	Swing by my place and I'll show you. I have to pull the carbs again and redo my jetting back to stock since I switched back to the stocker exhaust system. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

September 25th, 2014, 04:12 PM	#10
BearZ ninjette.org member Name: Zubair Location: Houston Join Date: Aug 2012 Motorcycle(s): 2012 Kawasaki Ninja 250R Posts: 34	Thanks for the help. There is a shop in front of my work that does this sort of thing all day. I went and had a chat with them and I'm going to take my 250 in on Saturday and have them take a look at it. I am going to ask my boss if I can borrow the company Van and trailer on Friday so I can move my bike.

October 11th, 2014, 06:45 PM	#11
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Did it get sorted? __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

October 11th, 2014, 07:53 PM	#12
BearZ ninjette.org member Name: Zubair Location: Houston Join Date: Aug 2012 Motorcycle(s): 2012 Kawasaki Ninja 250R Posts: 34	Yes it was resolved. I took it to a shop and they fixed it. There was gas in the cylinders.

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