Question about TM Racing MX 125 Motorcycles

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Moterbike kill switch were do i wire it to on the engine

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Hi
Wire it so that the neutral wire from the ignition coil gets switched to earth when kill switch turned to off position

Ride safe
Bike-Doc
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Posted on May 08, 2010

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Why won't my Husqvarna 150 BT blower shut off? It starts and runs great, but won't kill with the switch.


Kill switch most likely has broken wire between switch and engine. When in "kill" position, it should connect the top of the sparkplug to the rest of the engine. If it doesn't, either the switch is bad or the wire is.

Jun 15, 2015 | Husqvarna 150BT 50CC Gas Leaf Backpack...

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It needs a switch couse it wont shut off and canadian tire has no parts


Machines that won't shut off are 99% of the time a ground failure. You can check the kill wire at the engine (most times black of green) and see if touching it directly to ground kills the engine. if it does not kill the engine you can figure it is not the frame or wiring of the tractor but in the engine wiring. If the engine shuts off when you ground that wire then the issue is in the tractor wiring and most likely the ground wiring to or from the key switch. If the wires are okay then the key switch is the problem.
You can contact a dealer like www.arcolawn.com can get you parts if needed.

Feb 12, 2011 | Garden

1 Answer

I replaced ignition coil on a Tecumseh Toro 20018 mower. It would not start without disconnecting green "kill" wire. Now what do I need to do - replace the kill switch? Is the kill switch located on the...


It is a short in the kill switch, or the wire running to the kill switch. check insulation on the wire running to the kill switch and check the routing of the wire to insure that it is not being rubbed by moving parts, or the insulation melted by hot engine parts such as the exhaust system. Finally check that the kill switch itself is functioning properly with a test light or OHM Meter.

Aug 12, 2010 | Toro Garden

1 Answer

I have a1980 gs 850. i have no spark at the plugs. someone said i should start at the CDI box? How can you test this?


  • Start with new spark plugs. Do you see spark? If not, check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it.
  • Check the fuses. How good is the battery? Is the handlebar kill switch on?
  • Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing.
  • Then, If still no spark, get CDI system and coils checked at the dealers shop.

Aug 15, 2009 | Suzuki GS 400 E Motorcycles

1 Answer

Alri i was driving my kx250 and the engine died out on me an now it wont start atal


  • Drain the carb. It is probably filled with water that condensated in the gas tank.
  • Start with a new spark plug. Do you see spark? If not, check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it.
  • Only twist the throttle one time in ten kicks. Extra gas gets pumped in on every twist of the throttle. Twist too often and flooding happens.
  • Check the fuses. How good is the battery? Is the handlebar kill switch on?
  • Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing. If still no spark, get CDI system and coils checked at the dealers shop.
  • Got gas and is it turned on? Clean air filter?
  • Carb, head and intake manifold mounted tight?
  • Does the carb intake manifold have reeds? What condition are they in?

Aug 10, 2009 | 2003 kawasaki KX 250

1 Answer

1983 yamaha xj 650 no spark already changed the cdi coil plugs wires and mag pick up what next?


  • Do you see spark? If not, check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the side stand kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it.
  • Is the handlebar kill switch on? Is it shorted out?
  • Are you getting power to the coils?
  • Check the fuses. How good is the battery? Try a jump start from your car battery.
  • Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center or side casing. If still no spark, get CDI system and coils checked at the dealers shop.

Aug 06, 2009 | 1983 Yamaha XJ 650

1 Answer

No spark


Start with a new spark plug. Check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it. Check the fuses. How good is the battery? Try a jump start from your car battery. Is the handlebar kill switch on?

Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing. If still no spark, get CDI system and coils checked at the dealers shop.

Jul 29, 2009 | 1995 Honda XR 250 R

1 Answer

Replaced stop switch and it still won't shut off!


While attending college, I worked at a tool rental center and learned many tips and tricks from the mechanics. The problem that we heard the most from customers was that the machine would not start. Your your machine at least starts and runs fine, however will not shut down with the factory kill switch. Many times when replacing the mag. (spark coil) the kill wire would rub against the flywheel and break or over time the conductor wire will break inside the insulation. If you kill switch only has one wire, then all the kill switch does is short the mag to ground. Simple test is to remove spark plug, re-connect wire to plug, touch plug to engine and pull rope to observe spark, then short the tab on the magnito to ground, should be no spark. If you still have spark, coil is defective however good enough to run engine. Kill with choke or pull wire. If no spark with test, make new wire from tab of coil to kill switch or any switch that will short tab to ground. Good Luck

Jan 03, 2009 | Briggs Garden

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