July 11th, 2021, 12:07 AM | #1 |
ninjette.org member
Name: Deshone
Location: San Diego
Join Date: Jul 2021 Motorcycle(s): Kawasaki Ninja 250r Posts: 11
|
Water in crank case.
I recently received a ninja 250 as a gift (new rider). The air box was removed and replaced with some after market air filters by last owner so there is no air box. The hole in top of crank case has nothing covering it and not sure if it is suppose to. I’ve ridden the bike a couple times. Went to start it today and water started shooting out of the crank case which it’s never done. Why would water be in there? What happened?
|
|
July 11th, 2021, 05:57 AM | #2 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
|
Yes, the crankcase vent should have (at very least) a filter. Inexperienced hands have removed the airbox, leaving the cc breather entryway exposed to the elements!
Sounds as if it was left outdoors for some term and water has filled it! Dump your oil and filter immediately......as in DON'T even start it until you do so. A tight fitting hose over the vent, plus a K&N vent filter (see internet) should get you better. Long term....seek and replace the airbox and associated piping, return to normal jetting specs.
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
2 out of 2 members found this post helpful. |
July 11th, 2021, 07:03 AM | #3 |
ninjette.org member
Name: Deshone
Location: San Diego
Join Date: Jul 2021 Motorcycle(s): Kawasaki Ninja 250r Posts: 11
|
The bike was outside but it was covered the whole time. And it hasn’t been sitting that long. This all happened yesterday and I rode the bike last weekend and it was fine. The water has to be from somewhere internal. The water coming out also has a slight smell of fuel to it.
|
|
July 11th, 2021, 08:03 AM | #4 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
|
Are you sure there's any water at all? It's possible the carb float valves are not sealing and your petcock is leaking, causing the crankcase to fill with gasoline. It happened recently to another member here.
Obviously you need to change the engine oil and the oil filter. When you do that you can see if there is really water, which will go to the bottom and be the first to drain out, or if it's gasoline, which will mix with the oil. Then we can go from there. |
2 out of 2 members found this post helpful. |
July 11th, 2021, 08:26 AM | #5 |
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
|
If it isn't rain water, it has to be coolant. Check the level on the coolant overflow bottle.
As noted, it could also be gas. That would mean the petcock and the carb need attention. The petcock is supposed to stop fuel flow unless there is vacuum (engine running) and the carb's float valves are supposed to stop fuel flow unless the fuel level in the floatbowls drop (running). If you have gas in the oil, both have failed to work properly. In any case, you need to figure out what is going on before changing the oil/filter and starting the engine. |
|
July 11th, 2021, 08:32 AM | #6 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
|
|
|
July 11th, 2021, 09:54 AM | #7 |
ninjette.org member
Name: Deshone
Location: San Diego
Join Date: Jul 2021 Motorcycle(s): Kawasaki Ninja 250r Posts: 11
|
The coolant level was good when I checked
So to check the petcock I jst need to pull the hoses off and see if fuel is constantly coming out? For the carb open it and see if the floats are stuck in the down position? There no other way fuel can get down there? |
|
July 11th, 2021, 10:01 AM | #8 | |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
|
Quote:
It's possible that the float arms can get stuck, but not usually on a motorcycle that's been in running condition. Checking for free movement of the floats is always a good idea though. |
|
|
July 11th, 2021, 10:04 AM | #9 |
ninjette.org member
Name: Deshone
Location: San Diego
Join Date: Jul 2021 Motorcycle(s): Kawasaki Ninja 250r Posts: 11
|
Okay I’m going to check the carb out today and see if the seals are messed up. I’ll let y’all know what happens.
|
|
July 11th, 2021, 03:04 PM | #10 | |
ninjette.org member
Name: Sergey
Location: Ontario, GTA
Join Date: Oct 2019 Motorcycle(s): Ninja ZZR250 (EX250H) Posts: 213
|
Quote:
To check if the valves are sealing properly just connect a transparent hose to the carb drain outlet on the bottom and point the other end up. Open the screw valve that closes that drain valve and observe the fuel level. If the tank is valve is in the on position and good as well as the float valve is working fine the fuel will level. You can then switch to prime. If the level does not change your float valve is good. Be careful here if the level is higher than the main jet it will leak into the intake. So open slowly and if you see it’s getting to that point stop. But if its gas in your oil wiit ll smell like gas So its easy to understand whether its gas or something else. |
|
|
July 15th, 2021, 11:41 PM | #11 |
ninjette.org member
Name: Deshone
Location: San Diego
Join Date: Jul 2021 Motorcycle(s): Kawasaki Ninja 250r Posts: 11
|
So I finally took everything apart today. Drained it and it’s def fuel ha. Pulled the tank and hoses off and the petcock not leaking from anywhere(still jst enough gas in the tank to make something come out if it was leaking) took the carb apart and the only thing I really see that could be wrong is one of the little needle valve things that the float attaches to doesn’t spring back up as much as the other one. They are both freely moving but on jst seems a little more worn. All gaskets look good. All other parts have been recently cleaned. What y’all think?
|
|
July 16th, 2021, 04:46 AM | #12 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
|
Renew/replace the float valves, clean the seats, use wet test to determine bowls fuel levels, tweaking as necessary to attain correct, equal levels.
Additionally, still recommend a crankcase breather filter as well, if not full airbox replacement.
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com Last futzed with by ducatiman; July 16th, 2021 at 07:13 AM. |
1 out of 1 members found this post helpful. |
July 16th, 2021, 04:58 AM | #13 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
|
Agreeing with Ducatiman above... Fuel had to get past the petcock to then also get past the leaking float valves to fill the engine like that. Is it possible you accidentally left it in the "prime" position when the problem happened?
|
|
July 24th, 2021, 12:32 PM | #14 |
ninjette.org member
Name: Honorio
Location: Rio Grande Valley
Join Date: Aug 2020 Motorcycle(s): Ninja EX250 Posts: 118
Blog Entries: 8
|
I agree with ducatiman
I sent him my carb and it came back mint!
__________________________________________________
RIDE IT UNTIL THE WHEELS FALL OFF, THEN BUY NEW WHEELS Last futzed with by JayVapes; July 24th, 2021 at 12:33 PM. Reason: Mispelled |
1 out of 1 members found this post helpful. |
August 4th, 2021, 04:44 AM | #15 |
Retired motorcycle Mc.
Name: Robert
Location: Weed, California.
Join Date: Jul 2021 Motorcycle(s): 2012 Kawasaki Ninja 250R, 2021 CSC TT250, 1977 Triumph Bonneville 750cc,2001 Honda XR650L. Posts: A lot.
|
Vacuum petcocks usually leak in my experience they hardly ever seal off completely... My 2012 Ninja 250R 's vacuum petcock leaks real bad
it's like it's left on prime it's so bad ! i've had it apart 2 times but cannot find a thing wrong with it ! ...it just leaks !and there is no way to shut it off. ..... if the tank is a bit Rusty I'ed say there's your problem ! the rust will make the petcock leak and the floats leak too .... I used Kreem tank liner in my gas tank and it did a good job no more rust ! I should have left the acid etch in longer though... ..... Good luck fixing that monster ! Bob.......
__________________________________________________
Its too late when you've gone too far ! |
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Water in speedo case, help? | DanteCoal | General Motorcycling Discussion | 7 | March 30th, 2016 07:29 PM |
Gas in Crank case sight? (The hole where you see 2T) | gregoryl | 1986 - 2007 Ninja 250R Tech Talk | 18 | October 10th, 2014 05:56 PM |
White smoke from crank case breather | mickheaven | 2008 - 2012 Ninja 250R Tech Talk | 8 | September 14th, 2013 03:33 PM |
crank case bolt size(generator cover) | focus101 | 1986 - 2007 Ninja 250R Tech Talk | 1 | September 11th, 2013 06:10 PM |
Crank Case Vent Filter | cbzdel | 2008 - 2012 Ninja 250R Tech Talk | 18 | January 18th, 2013 02:23 PM |
|
|