SOURCE: Yz250F has no spark
your pickup coil is most likely bad.there are five wires coming out of the left stator side. three yellow or white and the other two are the pickup coil. trace them to the connector under the seat or tank . unplug the connector and check for continuity, if none is there , the pickup coil it is bad. yamaha sells the stator and the pickup coil together. very costly , you can buy the pickup oil off ebay for about $30.00.
becareful as the screws holding the pickup coil in are lock tited in and need to be heated to remove them without damage.
goodluck, edbiggs
SOURCE: my keeway wont start
Check the fuses. Is the kill switch on or shorting out? Disconnect it and then check for spark. Sidestand/centerstand should be up, Got a good battery?
I am unfamiliar with your Keeway and just trying to help. Don't give me a bad rating if I miss the mark on this one. Thanks.
SOURCE: TTR 90 wont start. Not carb. Not CDI. Plug cap?
Every component plays a part in the ignition system. Check the wiring as you go. Start at one end and move forward. You have done a lot of work so far. so you should be close. If the igniter is fine and the other components too. Then it would narrow it down to an electrical problem or no signal/pulse to the coil. See if the coil is receiving that pulse. you can use a test light for this test. Pos. will be power and NEG. will be the pulse. With light on the NEG. crank the engine over and see if it flashes. Let me know how its going.
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