ADVrider

Go Back   ADVrider > Bikes > Road warriors
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-19-2013, 06:28 PM   #1
indr OP
.
 
Joined: Feb 2010
Location: .
Oddometer: 501
[HELP] No spark!!! (Ninja 250)

...

indr screwed with this post 02-22-2015 at 10:32 PM
indr is offline   Reply With Quote
Old 06-19-2013, 06:42 PM   #2
concours
WFO for 41 years
 
concours's Avatar
 
Joined: Dec 2008
Location: Kensington, NH USA
Oddometer: 5,415
kill switch, sidestand switch, etc. not wired, or not in the correct state.
Did you GROUND the plug's threads when checking?
__________________
Too much is just barely enough.....
concours is offline   Reply With Quote
Old 06-19-2013, 06:50 PM   #3
Mad_Jack
Adventurer
 
Joined: Mar 2010
Location: Somewhere in the coulees
Oddometer: 26
Checking for spark

"The way I checked that there is no spark is I pulled one of the plugs out, attached it to it's boot and pushed the starter button. I didn't see any arcing on the plug, and there therefore concluded that there is no spark."

You've got one end of the plug in the boot but what are you doing with the plug? If you're just letting it dangle in the air, you won't get a spark 'cause the circuit isn't complete; you have to ground the plug.

Plugs are designed to ground through the head when it's screwed in. You need to connect the threaded part to something that's grounded (and preferably someplace that isn't in bright sunlight, either).

For a few bucks, you can get a plug tester at the auto store; the one I've got has a boot on one end and a plug on the other with a light in the middle. Neat thing about this is that you can plug it in and leave it while you're testing. Works real nice when you think you might have an intermittent spark issue.
__________________
I'm an ex-citizen of nowhere...and sometimes I get mighty homesick.
Mad_Jack is offline   Reply With Quote
Old 06-19-2013, 07:02 PM   #4
*Gmoney*
don't look here
 
*Gmoney*'s Avatar
 
Joined: Mar 2008
Location: Where I want to be
Oddometer: 911
My spark tester wised up,
I use to tell my little brother hold on to this metal I stuck in the spark plug boot, tell him to steady himself by holding on to something metal on the bike.
I would kick it over, if he screamed, I knew I had spark.
And if you take the plug out the motor spins faster, makes a bigger spark, he learned.

*Gmoney* screwed with this post 06-19-2013 at 07:08 PM
*Gmoney* is offline   Reply With Quote
Old 06-19-2013, 08:01 PM   #5
*Gmoney*
don't look here
 
*Gmoney*'s Avatar
 
Joined: Mar 2008
Location: Where I want to be
Oddometer: 911
There should be a drain screw to drain the carb bowl if it is not seized, to see if you are getting gas that far.
If it is seized then you are going to be removing carb and cleaning main jets idle jets choke circuit etc.
Google ninja carbs should help you videos etc.
*Gmoney* is offline   Reply With Quote
Old 06-19-2013, 08:10 PM   #6
GreaseMonkey
Preshrunk & Cottony
 
GreaseMonkey's Avatar
 
Joined: Jun 2006
Location: The only county in Illinois with no train tracks
Oddometer: 5,329
Get some starting fluid and shoot it in the carbs and see if the bike starts up. If it starts and then dies then you know it is a fuel delivery issue. However, if you shoot it with fluid and it does not at least hit a little bit then you know to look elsewhere.
GreaseMonkey is offline   Reply With Quote
Old 06-19-2013, 08:43 PM   #7
GreaseMonkey
Preshrunk & Cottony
 
GreaseMonkey's Avatar
 
Joined: Jun 2006
Location: The only county in Illinois with no train tracks
Oddometer: 5,329
Yes, not much just a 1 second shot or so. That will let you know if it is a fuel issue as the engine will start and then die but at least you will know then it is a fuel problem.
GreaseMonkey is offline   Reply With Quote
Old 06-20-2013, 10:12 AM   #8
KungPaoDog
Gnarly Adventurer
 
Joined: Apr 2010
Location: Colorado
Oddometer: 477
It sounds like the carbs need a full cleaning/rebuild. There are many stories of old gas doing bad things to carbs. I'd be shocked if any rubber parts from 2010 (did I read that right?) are bad and hard form old age, but all bets are off if you used the wrong chemicals to clean them. Also, any rubber parts are, of course, vulnerable to scratching, scoring, gouging, etc. from poor dis-assembly technique. Don't worry, I'm sure we've all trashed a good part at some time. After you've taken something apart: "oh, THAT is how it was supposed to come apart."
__________________
2010 Honda NT700V-Red
KungPaoDog is offline   Reply With Quote
Old 06-20-2013, 12:51 PM   #9
GreaseMonkey
Preshrunk & Cottony
 
GreaseMonkey's Avatar
 
Joined: Jun 2006
Location: The only county in Illinois with no train tracks
Oddometer: 5,329
Well look at the bright side- at least you didn't waste a day cleaning the carburetors!

You may have poor compression, wouldn't hurt to test with a compression gauge but in general starting fluid will make it sputter even with poor compression so odds are that is not your problem, but might as well locate a compression tester at some point.
GreaseMonkey is offline   Reply With Quote
Old 06-20-2013, 12:52 PM   #10
GreaseMonkey
Preshrunk & Cottony
 
GreaseMonkey's Avatar
 
Joined: Jun 2006
Location: The only county in Illinois with no train tracks
Oddometer: 5,329
Next thing to do is get a voltmeter and check for an AC voltage being generated by the crank sensor.
GreaseMonkey is offline   Reply With Quote
Old 06-20-2013, 03:39 PM   #11
H96669
A proud pragmatist.
 
H96669's Avatar
 
Joined: Nov 2009
Location: Hiding off Hwy 6, B.C.
Oddometer: 4,720
Plenty of compression to start. Motor never ran so rings need seating and then a compression check to make sure the "differential" between cylinders is within acceptable limits.

No need to tear it down just yet, something else is going on if it doesn't start.
__________________
Have tools, will travel!
H96669 is offline   Reply With Quote
Old 06-20-2013, 06:40 PM   #12
H96669
A proud pragmatist.
 
H96669's Avatar
 
Joined: Nov 2009
Location: Hiding off Hwy 6, B.C.
Oddometer: 4,720
Well...now you have to make sure them valves are opening and opening at the right time.And that it is also firing at the right time.

BTW I'd try the starting fluid again. I don't think the "new" stuff is all that good and sure evaporates fast. Took a lot of that to start up my little chain saw recently after a few years hibernation, and that was sprayed right at the carb.

Throttle slides jammed open....spray bottle of gasoline. Oooops the things we used to do.
__________________
Have tools, will travel!
H96669 is offline   Reply With Quote
Old 06-20-2013, 11:19 PM   #13
Tim McKittrick
Beastly Adventurer
 
Joined: Dec 2003
Location: Wasilla Alaska
Oddometer: 1,763
The old style Ninjetts have a vacuum petcock and need the engine to be running to supply gas to the carbs. For some reason Kawasaki did not include a "prime" selector on the petcock to bypass the vacuum operation. Are you sure you have sufficient gas in the carburetors? If you have a means to do so decant some fuel directly into the carb feed line to endure the float chambers are full.

This used to really irk me with my ninjette- it always took prolonged cranking to get enough gas into the carbs after a winter of sitting to get it to start.
Tim McKittrick is offline   Reply With Quote
Old 06-21-2013, 06:55 AM   #14
Dave in Wi
Beastly Adventurer
 
Dave in Wi's Avatar
 
Joined: Feb 2007
Location: Madison WI (40 Square Miles Surrounded By Reality)
Oddometer: 2,031
Well, if it's got fuel, spark and compression, go shut it off! :-)

Sounds like fuel is getting to the carbs and there is enough compression to let it start.

I'd try this, remove the spark plugs and put a little gasoline into the cylinders. Not too much, a teaspoon at most. Screw the plugs back in quickly, hook them up and try to start it. I used to use this trick on older bikes that had a hard time starting in the spring.

I'm suspecting something in the timing, either cams or ignition. But I don't think the ignition timing is adjustable (could be totally wrong here). Give the gas test a shot and see what happens. Spraying starting fluid from the outside of the air filter won't let it get to the carbs BTW.
__________________
Dave in WI
2002 ZRX1200R
1975 XL100
1988 DT50
"Daddy, it's five o'clock sometime!"
Dave in Wi is offline   Reply With Quote
Old 06-21-2013, 07:27 AM   #15
KungPaoDog
Gnarly Adventurer
 
Joined: Apr 2010
Location: Colorado
Oddometer: 477
Reading back, are you SURE you have good spark? A timing light is a great way to see if you have spark. You don't have to point it at a fly wheel with timing marks, just hook it up and point it at your hand or something that can't be blinded.

Air: Check

Spark: Maybe Check?

Fuel: Probably check. If the carbs have been cleaned and you can flow fuel from the tank, you probably have fuel.
__________________
2010 Honda NT700V-Red
KungPaoDog is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 01:32 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2015