Starting problems

Tango89er · September 17th, 2016, 06:50 AM

So, having a few problems with my EX 250F
Had it running a week after I bought it, with the help of fresh petrol, a new battery and a little bit of a Nulon spray called 'Start Ya Bastard'

Ran a little rough, idled nicely after about five minutes though, and revved right up to 14k rpm really well. Since then though, I've pulled out the carbies and gave them a clean, replaced the engine intake boots.

Unfortunately, it took me a few weeks to get it back together and now I can't get it started.

Any ideas?

JohnnyBravo · September 17th, 2016, 12:34 PM

You getting fuel and spark?
I can't diagnose the problem without more info :/

Things usually run a bit rough at first when you start them on the spray.

Tango89er · September 17th, 2016, 03:35 PM

Getting both fuel and spark. Just drained the carbies to check for water because the fuel tank has been sitting for a while, but it was fine

JohnnyBravo · September 17th, 2016, 03:42 PM

It turns over but won't crank?

You sure the fuel is getting to the combustion chamber?
All it takes is fuel, spark, an combustion an things work like magic... Something ain't doing right

Is it flooded? If no...

Squirt it again, see what happens

jkv45 · September 17th, 2016, 07:05 PM

Quote:

Originally Posted by Tango89er

Getting both fuel and spark. Just drained the carbies to check for water because the fuel tank has been sitting for a while, but it was fine

If you drained the carbs you will need to do some extra cranking to get fuel to the floatbowls.

Charge the battery and give it another try.

Tango89er · September 17th, 2016, 11:36 PM

Quote:

Originally Posted by jkv45

If you drained the carbs you will need to do some extra cranking to get fuel to the floatbowls.

Charge the battery and give it another try.

How long should I crank it for? Is flooding a concern?

JohnnyBravo · September 17th, 2016, 11:54 PM

Link to original page on YouTube.
Don't just hold down the starter button, you could burn out your starter

Just don't twist the throttle an you won't flood it

Tango89er · September 18th, 2016, 03:55 AM

Awesome, I'll give that a try, see how it goes

jkv45 · September 18th, 2016, 05:56 AM

Quote:

Originally Posted by Tango89er

How long should I crank it for? Is flooding a concern?

I'd put on full choke, and crank for a max of 10 seconds at a time with 10 seconds between attempts.

As soon as you get a sputter, back the choke off a bit. Once it's going set the choke to keep the revs about 2000 to 2500. Turn it off completely as soon as it will idle without dying.

Did you remove the caps and set the idle mixture screws to 2.5 turns out?

Tango89er · September 18th, 2016, 07:27 AM

So found a moment of reprieve from the rain to give the bike another look over (Perth weather is pretty bad at the moment). Turns out the problem was simply a leaking petcock and a half-flat battery. Letting everything drain for a bit while I charged the battery fixed everything.

Barely cranked at all before coming to life.

Just need to adjust the idle and throttle cables

JohnnyBravo · September 18th, 2016, 02:02 PM

Sweet work man!

Snake · September 18th, 2016, 02:13 PM

Awesome!

Triple Jim · September 18th, 2016, 02:15 PM

For a leaking petcock to cause trouble, something else has to also be leaking, like the carburetor float valves.

Replacing the little O-ring on the petcock's valve plunger stopped mine from leaking. They're an industrial size 007 Viton O-ring, available from industrial suppliers. McMaster-Carr is one.

Tango89er · September 19th, 2016, 03:16 AM

Quote:

Originally Posted by Triple Jim

For a leaking petcock to cause trouble, something else has to also be leaking, like the carburetor float valves.

Could easily be the float valves, I didn't check them too well. Starts first time, every time now, but starts revving despite no throttle being applied. Cables are tight though, so I will adjust those as well as while I'm poking around

Tango89er · September 23rd, 2016, 01:46 AM

So, finally ripped the carbs out again. Checked the float bowls, sorted out the idle adjust screws, gave the petcock a look over. Put it all back together and now we have this:

https://youtu.be/he5FqOfGE1o" TARGET="_blank">Link to original page on YouTube.
https://youtu.be/he5FqOfGE1o

Starts from cold no problem, idles at 1500 rpm

jkv45 · September 23rd, 2016, 06:54 AM

^ Embed and link for the video doesn't work.

RacinNinja · September 23rd, 2016, 06:58 AM

Quote:

Originally Posted by Tango89er

So, finally ripped the carbs out again. Checked the float bowls, sorted out the idle adjust screws, gave the petcock a look over. Put it all back together and now we have this:

Link to original page on YouTube.

Starts from cold no problem, idles at 1500 rpm

September 17th, 2016, 06:50 AM	#1
Tango89er ninjette.org member Name: Pete Location: Perth, Australia Join Date: Sep 2016 Motorcycle(s): '89 Ninja 250 (#3650) Posts: 78	Starting problems So, having a few problems with my EX 250F Had it running a week after I bought it, with the help of fresh petrol, a new battery and a little bit of a Nulon spray called 'Start Ya Bastard' Ran a little rough, idled nicely after about five minutes though, and revved right up to 14k rpm really well. Since then though, I've pulled out the carbies and gave them a clean, replaced the engine intake boots. Unfortunately, it took me a few weeks to get it back together and now I can't get it started. Any ideas?

September 17th, 2016, 12:34 PM	#2
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	You getting fuel and spark? I can't diagnose the problem without more info :/ Things usually run a bit rough at first when you start them on the spray. __________________________________________________
	1 out of 1 members found this post helpful.

September 17th, 2016, 03:35 PM	#3
Tango89er ninjette.org member Name: Pete Location: Perth, Australia Join Date: Sep 2016 Motorcycle(s): '89 Ninja 250 (#3650) Posts: 78	Getting both fuel and spark. Just drained the carbies to check for water because the fuel tank has been sitting for a while, but it was fine
	1 out of 1 members found this post helpful.

September 17th, 2016, 03:42 PM	#4
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	It turns over but won't crank? You sure the fuel is getting to the combustion chamber? All it takes is fuel, spark, an combustion an things work like magic... Something ain't doing right Is it flooded? If no... Squirt it again, see what happens __________________________________________________
	1 out of 1 members found this post helpful.

September 17th, 2016, 11:54 PM	#7
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	Link to original page on YouTube. Don't just hold down the starter button, you could burn out your starter Just don't twist the throttle an you won't flood it __________________________________________________
	1 out of 1 members found this post helpful.

September 18th, 2016, 03:55 AM	#8
Tango89er ninjette.org member Name: Pete Location: Perth, Australia Join Date: Sep 2016 Motorcycle(s): '89 Ninja 250 (#3650) Posts: 78	Awesome, I'll give that a try, see how it goes

September 18th, 2016, 07:27 AM	#10
Tango89er ninjette.org member Name: Pete Location: Perth, Australia Join Date: Sep 2016 Motorcycle(s): '89 Ninja 250 (#3650) Posts: 78	So found a moment of reprieve from the rain to give the bike another look over (Perth weather is pretty bad at the moment). Turns out the problem was simply a leaking petcock and a half-flat battery. Letting everything drain for a bit while I charged the battery fixed everything. Barely cranked at all before coming to life. Just need to adjust the idle and throttle cables
	1 out of 1 members found this post helpful.

September 18th, 2016, 02:02 PM	#11
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	Sweet work man! __________________________________________________

September 18th, 2016, 02:13 PM	#12
Snake ninjette.org certified postwhore Name: Rick Location: Alexandria, Louisiana Join Date: Jan 2009 Motorcycle(s): 05 Blue Ninja 250 Posts: Too much. MOTY - 2017, MOTM - Jan '19, Oct '16, May '14	Awesome!

September 18th, 2016, 02:15 PM	#13
Triple Jim 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	For a leaking petcock to cause trouble, something else has to also be leaking, like the carburetor float valves. Replacing the little O-ring on the petcock's valve plunger stopped mine from leaking. They're an industrial size 007 Viton O-ring, available from industrial suppliers. McMaster-Carr is one.

September 23rd, 2016, 01:46 AM	#15
Tango89er ninjette.org member Name: Pete Location: Perth, Australia Join Date: Sep 2016 Motorcycle(s): '89 Ninja 250 (#3650) Posts: 78	So, finally ripped the carbs out again. Checked the float bowls, sorted out the idle adjust screws, gave the petcock a look over. Put it all back together and now we have this: https://youtu.be/he5FqOfGE1o</a>" frameborder="0" allowfullscreen> https://youtu.be/he5FqOfGE1o" TARGET="_blank">Link to original page on YouTube. https://youtu.be/he5FqOfGE1o Starts from cold no problem, idles at 1500 rpm Last futzed with by Tango89er; September 23rd, 2016 at 07:05 AM. Reason: Video problems, apparently

September 23rd, 2016, 06:54 AM	#16
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	^ Embed and link for the video doesn't work.

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