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Old March 21st, 2013, 09:29 PM   #1
JarodVoss
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ignition bypass? 100ohm resistor

My buddy has a 2002 ninja 250 and I have a 2011 ninja 250 his little brother got ahold of the keys and broke his key off my ignition tried to get the key out wouldn't come so I decided to try and hot wire it (dumb idea) I know that you need a 100 ohm resistor somewhere in the ignition system but I can't figure out how to I get the bike to turn over without the resistor but won't crank how do you wire the resistor into the ignition system. New system costs 250$ don't have the money cause my transmission in my truck went out so now my truck and bike are useless to me. Any help is needed thanks
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Old March 22nd, 2013, 04:24 AM   #2
NathanUc
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Quote:
Originally Posted by JarodVoss View Post
My buddy has a 2002 ninja 250 and I have a 2011 ninja 250 his little brother got ahold of the keys and broke his key off my ignition tried to get the key out wouldn't come so I decided to try and hot wire it (dumb idea) I know that you need a 100 ohm resistor somewhere in the ignition system but I can't figure out how to I get the bike to turn over without the resistor but won't crank how do you wire the resistor into the ignition system. New system costs 250$ don't have the money cause my transmission in my truck went out so now my truck and bike are useless to me. Any help is needed thanks
I'm sorry that I can't help you with your main question, but you can buy a new ignition for much cheaper than $250. Mine has minor issues in the winter when water/condensation freezes inside the turning mechanisms so I was looking at replacements. You can get them as low as $55 and high as $100.

Also, I've been told that if you can find JUST the ignition, you can take it to a locksmith and have it re-keyed to your old set so you wouldn't need multiple keys for the same bike. I don't know how true this is but it might help you.
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Old March 22nd, 2013, 12:01 PM   #3
jconolty
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I have one ill sell ya with key and gas cap to match
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Old March 22nd, 2013, 12:34 PM   #4
Aufitt
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Was going to start a thread on this as there is 20 threads that didn't quite conclude as to the 100ohm bridging 2 wires.

My race bike has a loose ignition (I think the shear bolts are butchered or loose.)
it looks like it weighs a tonne and I want it gone, its about to fall out.

What are the racers using for a switch n the US?
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Old April 17th, 2013, 08:01 PM   #5
CZroe
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I've seen Chinese replicas of the ignition cylinders and gas caps with new keys (different key design so hang on to the old one for the other locks). I bought the replica gas cap. I can't seem to find the replica ignition for the EX250F anymore but I can find the ol' EMGO replacement one:
http://www.ebay.com/itm/Kawasaki-EX2...13d246&vxp=mtr

The wiring harness and CDI is different in later year models so that old one probably won't work (before they had the 100ohm lockout). Perhaps a $40 replica from the J-series will work?
http://www.ebay.com/itm/KAWASAKI-EX2...7faf08&vxp=mtr

I'll try it and see. It mounts under the triple the same way but the triple doesn't surround it on the F-series.
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Old April 18th, 2013, 06:59 PM   #6
HotRedTurbo
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Quote:
Originally Posted by Aufitt View Post
Was going to start a thread on this as there is 20 threads that didn't quite conclude as to the 100ohm bridging 2 wires.

My race bike has a loose ignition (I think the shear bolts are butchered or loose.)
it looks like it weighs a tonne and I want it gone, its about to fall out.

What are the racers using for a switch n the US?
I wired my racebike to use a switch. The information is in the service manual electrical wiring diagram. Well, except the 100 ohm resistor part.

The resistor is in the ignition from the igniter side (gray) I believe. When turning on the ignition switch, it is positioned in series with a 12V source (2 White wires). You also need the regulator wire seeing a 12V source when on. If you want to do this mod, I would recommend getting a switch with an LED, just to make sure you have 12V when turned on. I did just incase something goes wrong at the track it'll help me troubleshoot faster (ie: bike is not turning on and LED is not turning on means there's no voltage. Battery/wiring issue). I'm working now but I'll try to go home and take pix during lunch, which is very soon.

PS: When in doubt, ohm it out. Cut all wires to ignition switch and start ohming out every combination of paired wires possible (with position ON of course). You'll find which 2 wires it is that way.

Last futzed with by HotRedTurbo; April 18th, 2013 at 07:02 PM. Reason: adding PS information
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Old November 11th, 2014, 08:52 PM   #7
ascencionalberto
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hot red turbo do you have pictures on how you wired yours

Quote:
Originally Posted by HotRedTurbo View Post
I wired my racebike to use a switch. The information is in the service manual electrical wiring diagram. Well, except the 100 ohm resistor part.

The resistor is in the ignition from the igniter side (gray) I believe. When turning on the ignition switch, it is positioned in series with a 12V source (2 White wires). You also need the regulator wire seeing a 12V source when on. If you want to do this mod, I would recommend getting a switch with an LED, just to make sure you have 12V when turned on. I did just incase something goes wrong at the track it'll help me troubleshoot faster (ie: bike is not turning on and LED is not turning on means there's no voltage. Battery/wiring issue). I'm working now but I'll try to go home and take pix during lunch, which is very soon.

PS: When in doubt, ohm it out. Cut all wires to ignition switch and start ohming out every combination of paired wires possible (with position ON of course). You'll find which 2 wires it is that way.
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Old November 12th, 2014, 06:41 AM   #8
garth285
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http://www.garth285.com/howto/08-12-...nition-wiring/

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Old November 12th, 2014, 12:35 PM   #9
InvisiBill
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Quote:
Originally Posted by garth285 View Post
You don't even need to bother with the white/black wire on a race bike. It forks off the white wire just before the ignition switch, so you're simply creating something like ---<===>--- with that setup. Assuming your race bike doesn't need lights or a horn, the only thing the brown wire is even powering is the ignition fuse (ignitor and kill switch). Wiring Diagram

For a street bike, the ignition switch normally connects the white wire to the brown wire for switched power to accessories and to the gray wire (including the resistor) for the ignition, as pictured in garth's diagram. The white/black wire (again, it's just a branch off the white wire) feeds the white/green wire that powers the turn signal fuse. The ignition switch also bridges the red/blue wire (coming from the taillight fuse) to the red wire (running to the taillight).

In summary, the ignition switch is a 3-pole switch. 1 feeds constant power to the ignitor and switched power circuits. 2 feeds fused taillight power to the taillight. 3 feeds constant power to the flasher circuit.


I'm half tempted to try making some PnP replacement parts for racebikes to easily remove all the unnecessary stuff, without having to learn/know anything about the wiring.
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Old April 25th, 2016, 09:54 AM   #10
Razaraac
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2008 ninja 250r ignition

So I'm having to replace the ignition switch on my bike. I know I have to drill the security bolts out and if I buy an aftermarket switch I need to wire in a 100 ohm resistor. Which wire do I install it on with the new switch, or does someone know of an aftermarket switch that doesn't need a resistor. My other question is about the bolts. When I drill them out, what kind of bolts should I use to install the new switch
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Old June 30th, 2022, 02:39 AM   #11
Texas boy
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What color wire does the 100 ohm resistor need to get soldier onto on my 1996 Kawasaki ninja zx750
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Old June 30th, 2022, 06:11 PM   #12
DannoXYZ
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Quote:
Originally Posted by Texas boy View Post
What color wire does the 100 ohm resistor need to get soldier onto on my 1996 Kawasaki ninja zx750
Hi and welcome!

You'll need to get wiring-diagram and determine if '96 ZX750 has similar ignition-switch wiring as '95+ Ninja 250.

Here's some photos and diagrams on these threads that will help you: search for "ignition-switch 100-ohm resistor"
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