Question about kawasaki Ninja 250R Motorcycles

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Ninja 250 run on petcock set to prime only

My 2008 ninja 250 having petcock problem when i set it to the on position it rub for a couple of minutes and dies when it is set to prime runs fine what the deal

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2008 ninja 250 it starts but as u give it gas it

I would start off by removing the fuel tank, I would then remove the line from the tank to the carbs and lightly and gently blow air from a hose into the carbs, this will free up any dirt or trash that may have gotten into the carbs.

Posted on Mar 06, 2009

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Benimur
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SOURCE: 2002 kawasaki ninja ex 250,engine dies after clutch is released

Hi and welcome to FixYa,

For some reason, the problem is incomplete...

  • "2002 kawasaki ninja ex 250,engine dies after..."
If the problem is, idle and revs good while in neutral but shuts down when gear is engaged, then it would most likely be the sidestand switch. Try to check, clean, bypass or replace.

Otherwise, postback to clarify and/or describe fully.

Good luck and thank you for using FixYa.

Posted on Apr 25, 2009

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SOURCE: i have 1995 ex 250 ninja and need carb vacum hose

d619541.gifThis should help alot.

Posted on Jun 28, 2009

  • 1 Answer

SOURCE: my 2009 ninja 250r starts but dies when you remove

I had the same problem.. choke cable had to be adjusted. Check the manual, I don't have mine handy but the measurement is in there.. check it out.

Posted on Jul 12, 2009

  • 1 Answer

SOURCE: position on a petcock for a 1994 suzuki katana 600

I have the same problem on my gsx 600f! there is no markings to say which is ON, or PRIME, or RESERVE on the petrol tap!

I'd like to know before I run out of petrol on reserve!

Is the ON position with the arrow pointing down? lots of people seem to be asking the same thing across the web! Can we have a solution please!!!!

Posted on Nov 07, 2009

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2 Answers

The petcock valve on the Bigboy TSR 250. What position must the valve handle be when driving. Please explain the 3 positions on the valve.


Is the tap vacuum operated? There will be a pipe from the carb to the tap if there is, and when the engine is running the vacuum from the carb pulls on a diaphragm and opens the flow.
If this is the case, the 3 positions are "PRIME", "MAIN" and "RESERVE".
Disconnect the pipe from the outlet of the tap, but be prepared for fuel to come out. If it does, then the tap is set in the prime position so move it to another setting to stop it. If it doesn't start flowing then the tap is set to main or reserve.
Main and reserve are self explanatory and are standard on most bikes, but prime is not on as many. Never ride on prime as this just allows fuel to flow freely and is only used to start a long standing bike or one that has been run to empty. It does what it says and primes the carb. Once running switch over immediately to main or reserve.

Oct 22, 2015 | Motorcycles

1 Answer

1981 yamaha 650 what position should the petcok b in? pri res oo on


Fuel petcock position depends entirely on what you're doing with your bike at the time.

In normal use, the fuel petcock should be set to the "on" position and left there. In that position, gasoline will be drawn from the tank only when the engine is running and generating vacuum. This prevents overfilling the carbs when the bike sits.

When you're riding the bike and it starts to sputter, it's time to move the petcock to the "reserve" position so that you can use the last few drops in the tank (on a 650 special, this was either .3 or .5 gallons--can't remember which off the top of my head) to nurse your bike to a gas station. Once you've filled the tank, move the petcock back to "on." The bike will still run fine if you keep the petcock in the reserve position, but when it starts to run low on gas--well, you won't have that emergency reserve to get yourself to the gas station.

If you've managed to run the bike out of gas completely, or if you are getting the bike ready for service after having drained the carbs for the winter, you'll need to move the petcock to the "prime" position for a few minutes. This by-passes the vacuum line cutoff mechanism and lets gasoline flow until the carb floats shut off the fuel valve (this is also how all older motorcycle fuel petcocks operated). A sticky float or poorly sealing float valve in the carb can, however, cause far too much gasoline to drain into the carbs (and into the crankcase, if you're particularly unlucky), which is why you should not leave the petcock in the prime position for an extended period of time.

Some Yamaha XS650 motorcycles (can't tell if that's the model you have) have a tank with two fuel petcocks, one on each side, to fuel each carb. If you have a tank with this setup, be aware that setting one fuel petcock to "prime" will affect both cylinders, as there's a crossover tube to equalize fuel levels between the carbs. Also, for reasons I could never figure out, on one XS650 I owned, moving either petcock to "prime" permitted fuel to flow on a gravity feed out of both petcocks simultaneously. I could never figure out exactly why it was doing that.

Jun 06, 2011 | Yamaha XS 650 G Motorcycles

1 Answer

2002 ninja 250 idels good runs bad with no power band and sounds like its running on two cylinders but both exhaust pipes get hot,it just doesnt sound like a ninja should,i put new plugs with no change


The power band on a 2002 Ninja 250 does not kick in till you hit about 5000 RPM. The newer 2008 and up 250's kick in about 3000 RPM. There is a website devoted to the Ninja 250 that might give your more background into the motorcycle: ninjette.org You may want to replace your spark plug caps they may be robbing of the spark you need at take off. They simply unscrew off of the end of the wires. They should read 5000 OHM's no higher , no lower. If you purchase new NGK brand plug caps they will only cost about $5 each.

Jun 05, 2011 | 2008 kawasaki Ninja 250R

1 Answer

I ran out of gas, now it won't start. what do i do?


Okay....I think your bike may have a vacuum operated fuel petcock.....which is the fuel valve on the bottom of the tank. It shuts the fuel off automatically when the engine stops and the hose from the intake to the side of the petcock loses vacuum.
So when you restart the bike the petcock is closed till the engine starts...which is okay because there is a small amount of fuel in the carb.........until you run out of gas....then the engine quits and the carb is empty.
To handle this situation, typically there is a prime position on the petcock that allows flow without vacuum to "prime" the empty carb......usually marked as PRI on the petcock,
So rotate the lever on the petcocck to prime....wait a couple minutes....get the bike started and set the petcock back to the normal setting....don't leave it on PRIME as fuel may flow overflowing the carb.

Apr 04, 2011 | 2007 Yamaha XT 125 X

1 Answer

Regarding the fuel stopcock of yamaha chappy, it has three settings: on, reserve and PRI, what is the neaning of PRI?, thanks...


You have a vacuum operated petcock....so that when engine starts and draws vacuum...a diaphragm lifts in the petcock to supply fuel to carb. When the engine shuts off...vacuum is lost and the petcock closes.
If you run the tank empty....in order to get fuel into the carb and get the bike started initially....you can open the petcock without engine vacuum by rotating petcock to the PRIME position. Once started return the petcock to the ON position. If you leave it on prime....with engine off...fuel may leak into carb and run into engine and contaminate crankcase oil with fuel.

Mar 22, 2011 | Yamaha YZ 125 Motorcycles

1 Answer

Would the fairing parts of a 2006 kawasaki ninja 250 fit a 2005 kawasaki ninja 250?


Yes I do believe they do. Try going to Powersportseast.com Look in the shopping section on the left of the homepage. You will want to use the parts fische and load the info for your bike. It allows you to see what the dealer parts counter can see. See if this helps. I'm pretty sure the 250 ninja really didn't change until 2008 when it got the BIG overhaul

Nov 02, 2009 | 2008 kawasaki Ninja 250R

1 Answer

My 2008 Ninja 250 tires to start itself


The switch is the most likely source of the problem. Check it with a volt ohmmeter. Put the key in off and check the terminals. Next turn the key to the 1st position and check the terminals then on any further positions. The next time the bike self starts is when you want to re-check the switch terminals.

You know, this has all the signs of an internal short in the switch. Just tell the dealer to give you a new switch. Switch failure after 5 hours of riding is simply unacceptable.

Aug 08, 2009 | 2008 kawasaki Ninja 250R

1 Answer

89 kawasaki ninja 250 crank no start


ok i have one and i just fixed mine you need to drain the fuel from bottom of carbs and drain the tank also. then replace the spark plugs once you do that add new fuel in tank and drain the carbs again unitil good fule start runing out then shut them off. aftre that make sure there are two line connected to the petcock from the carb. spray soem starting fluid in the air box and chock it boom it will start. if it has spark.

chris

Jul 12, 2009 | 2008 kawasaki Ninja 250R

1 Answer

Fuel shut off valve


Recent shut off valves don't have an off position anymore it's been replaced with PRi which is prime..The petcock lever has a long side and a short side.w/long side pointed down that is ON..long side up that is RESERVE..halfway between is PRIME which is used when cycle has sat for a long time or has run out of gas...off is not used anymore cause the petcock is vacuum actuated and only lets gas flow when engine is running...except for PRIME, these should all be printed/stamped on your petcock...Good luck to you friend....Tim

May 11, 2009 | 1999 kawasaki ZXR 400

1 Answer

2001 250 ninja


make sure you are checking the timing using the number 2 cylinder, no the number one.

Feb 24, 2009 | 2008 kawasaki Ninja 250R

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