Question about 2004 Yamaha YZ 250 F

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I an working on a yamaha yfm 200n, problem is the key sw. is gone,as cut off befpr the 4 prong plug, i would like to have a tougle sw, no key. what wire would i conect? i have 4,bl, red, brown, bl/with white tracer.

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You cant hook up a toggle switch...a toggle switch will only work with two wires in the system.

You need to get the new switch and wire it in, they are cheap.

Be very carefull if you connect the wrong two wires together, you can fry the ignition circuits.

Btw, I’m available to help over the phone in case u need at

Posted on Jul 22, 2010

  • garnett_hock Jul 23, 2010

    your wiringwas un clear to me? my three wheeler is a 200E is all i can find. on thr motor is no. 52G006562 . I was able to get it starter with out doing any thing electricaly, by pull starting, no battery, thin i moved it for a test ride and it would not restart?? i look for shorted wire, nothing obvius. any ideas?



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Br (Brown) - Tail Light
BL/W (Black with White Tracer) - Ground
Bl (Black) - Instrument Cluster Light and Horn .
R (Red) - Power (+12v) . ----------------- The first step is to remove the two wiring harnesses that will be
modified: the key switch and the right clip-on switch cluster. Find and
disconnect the connectors that connect these harnesses to the main wiring
harness. The key switch has two connectors along the right frame spar.
The right clip-on switch cluster has a connector just in front of the
radiator on the right side. You will have to open some zip ties and a
clamp to get the harnesses free.

To remove the key switch, you will have to take off the top triple clamp
and remove the two tamper resistant Torx bolts. To remove the right
clip-on switch cluster, you will need to disconnect the throttle cables
from the cluster.

This one is actually quite simple. Start by cutting all the wires 2" from
the main connector. Cut the Br and Bl wires at the connector so they are
slightly recessed since they will not be used.
If you want to only modify the ignition switch then ignore the cluster part .
Putting it All Together:

Take the key switch harness and right clip-on switch cluster harness
connectors and plug them into the corresponding connectors on the main
wiring harness. Look at the R and O wires coming from the key switch
harness and the two unconnected wires coming from the right clip-on switch
cluster harness. If needed, cut the appropriate amount of wire from the
right clip-on switch cluster harness to allow for an uncluttered

Unplug the key switch harness and right clip-on switch cluster harness
connectors. Connect the R wire from the key switch harness to an
unconnected wire from the right clip-on switch cluster harness. Connect
the O wire from the key switch harness to the other unconnected wire from
the right clip-on switch cluster harness. Use electrical tape to insulate
all of the connections.

Put the kill switch in the "stop" position and plug the connectors in
again. Put the kill switch in the "run" position. The bike should power on
and be ready to start. Try starting the bike.

Posted on Jul 16, 2010

  • garnett_hock Jul 16, 2010

    hi, i am not following you , also my 3 wheeier dose not have a radiator,nor a key sw. it appears to have been cut off.i did take the kill sw appart, the black and black/white tracer go there.the other part of the story is in the oraganal message. ps sorry about sp.



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