it250 Posted January 10, 2009 Share Posted January 10, 2009 hi, i recently got a 81-82 yamaha it250 and there is a problem with the killswitch, The problem is that the killswitch sometimes works and sometimes doesnt. I brought a whole new killswitch from yamaha and it still didnt fix the problem. If anyone could help that be awesome. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 10, 2009 Moderator Share Posted January 10, 2009 Hi'... if there is just one wire to the kill switch and you have a multimeter Unplug the switch from the loom connector Switch the meter to measure resistance (200 Ohms scale) measure between the wire to the switch and chassis earth point With the kill ON or STOP, there should be no (1 or 2 ohms) resistance With the kill OFF or RUN, there should be high (open circuit) resistance Only do this if there is a single wire to the kill switch You can do a test by by-passing the switch Disconnect the switch Start the engine Using a piece of wire, short out the socket of the connector (loom side) to chassis...This should stop the engine and in effect is all that the kill switch does As i dont have a wiring diagram i have assumed that this bike is a magneto ignition system Link to comment Share on other sites More sharing options...
it250 Posted January 10, 2009 Author Share Posted January 10, 2009 thanks for the help oldgitionabike but i have two wire going to the killswitch? not just one. Hi'... if there is just one wire to the kill switch and you have a multimeter Unplug the switch from the loom connector Switch the meter to measure resistance (200 Ohms scale) measure between the wire to the switch and chassis earth point With the kill ON or STOP, there should be no (1 or 2 ohms) resistance With the kill OFF or RUN, there should be high (open circuit) resistance Only do this if there is a single wire to the kill switch You can do a test by by-passing the switch Disconnect the switch Start the engine Using a piece of wire, short out the socket of the connector (loom side) to chassis...This should stop the engine and in effect is all that the kill switch does As i dont have a wiring diagram i have assumed that this bike is a magneto ignition system Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 12, 2009 Moderator Share Posted January 12, 2009 If there are 2 wires, unplug the connector and check with your multimeter betwee the 2 wires to the switch, STOP = 2 or 3 Ohms, RUN = Open circuit BTW, What are the wire colours? Link to comment Share on other sites More sharing options...
it250 Posted January 12, 2009 Author Share Posted January 12, 2009 Thanks for the help but i found the problem about two hours ago it was a dogey wire to the coil i fixed it up and it works great know:) If there are 2 wires, unplug the connector and check with your multimeter betwee the 2 wires to the switch, STOP = 2 or 3 Ohms, RUN = Open circuit BTW, What are the wire colours? Link to comment Share on other sites More sharing options...
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