Help crank but no spark

mcad630 · May 21st, 2015, 10:33 AM

Ok i have exhausted all my searches and the faq and wiki pages on the site, so i am asking for help.

I got a 2003 ninja 250 as a project bike from a friend. It sat for a while and i am trying to just get it running before i dig deep into it. Here are the details

-No keys so ordered new ebay ignition
-dead battery so got new battery
-charged up battery and hooked up ignition we have power!
-horn lights blinkers brake lights all work (headlight is intermittent only seems to work while the bike is cranking)
-bike cranks no problem
-checked for spark no spark replaced plugs still nothing
-checked ignition fuse looks good
-kill switch in the off position no crank
-in gear with clutch pulled in and kick stand up it cranks so safety switches seem to be good
-checked for any unplugged, loose, or chewed up wiring and couldn't find anything
-checked the 30amp fuse on the solenoid looked good

i'm stumped any help would be great!

csmith12 · May 21st, 2015, 10:38 AM

Welcome Mike!

Gas + air + spark = a running bike.

Looks like your next step would be to ohm check the coils to continue your search for spark.

cuong-nutz · May 21st, 2015, 10:39 AM

Your problem is because you bought an Ebay/Chinese ignition. it does not have the 1/8 watt 100 ohm resistor to power the CDI to spend spark. Also, you have to make sure that the wiring pinout and and layout of the ebay ignition matches your harness. You'll have to take a part your ignition to verify. Be careful as the screws and aluminum are cheaply soft and you'll strip the threads easily.

DEFY · May 21st, 2015, 10:49 AM

There that pesky 100 ohm resistor is again lol

mcad630 · May 21st, 2015, 10:50 AM

Quote:

Originally Posted by csmith12

Welcome Mike!

Gas + air + spark = a running bike.

Looks like your next step would be to ohm check the coils to continue your search for spark.

next on my list was to find my multimeter and check the coils

gas and air i will deal with next

Quote:

Originally Posted by cuong-nutz

Your problem is because you bought an Ebay/Chinese ignition. it does not have the 1/8 watt 100 ohm resistor to power the CDI to spend spark. Also, you have to make sure that the wiring pinout and and layout of the ebay ignition matches your harness. You'll have to take a part your ignition to verify. Be careful as the screws and aluminum are cheaply soft and you'll strip the threads easily.

can't always trust ebay but the ignition plug and single butt connector matches the harness and butt connector on the bike

this was the ignition i purchased

http://www.ebay.com/itm/201216185083...%3AMEBIDX%3AIT

ninjunk · May 21st, 2015, 01:46 PM

http://faq.ninja250.org/images/a/a4/...matic_-_R4.pdf

You're looking at the grey wire there coming off the ignition switch, going to the CDI box.

I'm pretty sure it is getting power from the switch and you should be seeing something like 8v at the connection to the CDI box, but sometimes they run backwards and actually send power to ground through the 100 ohm resistor.

Either way, you can check it with a DMM. There is a chance the new switch cluster you bought doesn't have it, but seems like it ought to if they are selling it as direct replacement.

Pretty unlikely both coils pooped the sheets at the same time. CDI box could be fried, but that too is pretty uncommon.

mcad630 · May 26th, 2015, 06:48 AM

ok so tested the ignition coils and both are good.

Any other ideas other than the ignition not having the 100ohm resistor?

mcad630 · May 26th, 2015, 02:36 PM

Yup definitely doesn't have the 100ohm resistor.

And the DC volts at the ignition plug and cdi of the gray wire is 12.5 I saw somewhere it should be about 6

where should the resistor be wired into?

Thanks

May 21st, 2015, 10:33 AM	#1
mcad630 ninjette.org newbie Name: Mike Location: Middleboro Ma Join Date: May 2015 Motorcycle(s): 2003 ninja 250, 2000 Yamaha R6 Posts: 4	Help crank but no spark Ok i have exhausted all my searches and the faq and wiki pages on the site, so i am asking for help. I got a 2003 ninja 250 as a project bike from a friend. It sat for a while and i am trying to just get it running before i dig deep into it. Here are the details -No keys so ordered new ebay ignition -dead battery so got new battery -charged up battery and hooked up ignition we have power! -horn lights blinkers brake lights all work (headlight is intermittent only seems to work while the bike is cranking) -bike cranks no problem -checked for spark no spark replaced plugs still nothing -checked ignition fuse looks good -kill switch in the off position no crank -in gear with clutch pulled in and kick stand up it cranks so safety switches seem to be good -checked for any unplugged, loose, or chewed up wiring and couldn't find anything -checked the 30amp fuse on the solenoid looked good i'm stumped any help would be great!

May 21st, 2015, 10:38 AM	#2
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	Welcome Mike! Gas + air + spark = a running bike. Looks like your next step would be to ohm check the coils to continue your search for spark. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

May 21st, 2015, 10:39 AM	#3
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	Your problem is because you bought an Ebay/Chinese ignition. it does not have the 1/8 watt 100 ohm resistor to power the CDI to spend spark. Also, you have to make sure that the wiring pinout and and layout of the ebay ignition matches your harness. You'll have to take a part your ignition to verify. Be careful as the screws and aluminum are cheaply soft and you'll strip the threads easily. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days
	2 out of 2 members found this post helpful.

May 21st, 2015, 10:49 AM	#4
DEFY ᗧ•••ᗣ•ᗣᗣ•••ᗣ Name: Nick Location: NY Join Date: Nov 2013 Motorcycle(s): 2009 Ninja 250R and 2014 Triumph 675R Posts: A lot.	There that pesky 100 ohm resistor is again lol __________________________________________________ Spoiler for topic: It might just be the [you] tag

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May 21st, 2015, 01:46 PM	#6
ninjunk Lostcause enthusiast Name: Graham Location: Austin, TX Join Date: Jan 2015 Motorcycle(s): 2000 EX250F Posts: 178	http://faq.ninja250.org/images/a/a4/...matic_-_R4.pdf You're looking at the grey wire there coming off the ignition switch, going to the CDI box. I'm pretty sure it is getting power from the switch and you should be seeing something like 8v at the connection to the CDI box, but sometimes they run backwards and actually send power to ground through the 100 ohm resistor. Either way, you can check it with a DMM. There is a chance the new switch cluster you bought doesn't have it, but seems like it ought to if they are selling it as direct replacement. Pretty unlikely both coils pooped the sheets at the same time. CDI box could be fried, but that too is pretty uncommon.

May 26th, 2015, 06:48 AM	#7
mcad630 ninjette.org newbie Name: Mike Location: Middleboro Ma Join Date: May 2015 Motorcycle(s): 2003 ninja 250, 2000 Yamaha R6 Posts: 4	ok so tested the ignition coils and both are good. Any other ideas other than the ignition not having the 100ohm resistor?