I also had a TTR with no spark
I unplugged the condensor and (round thing under the tank with black and red wires) I then connected a 12 volt battery from my Xt I then switch on the ignition and test all the lights if all this is working you know the ignition switch is ok. I then tried to bypass the cut out switch, I also added another earth wire from the rectifier to the frame and I got a spark.
My bike has the netural switch and side stand switch removed so you should check your connections here also
When checking for a spark try doing it in a dark garage also you have to kick it over hard so you get enough power to make the spark
good luck
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