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My yamaha ttr 125 does not have any spark tried differant plugs but still nothing. had it going but it just cut off checked the fire and there was nothing.
Re: My yamaha ttr 125 does not have any spark tried...
Sounds like you need a new coil.( should be mounted with 2 bolts under gas tank ) just follow the plug wire to the coil. you can get a used one for about $40.00 0r new one for $80.00 on e-bay...
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The TTR-125 Carburetor's Run Lean by design. Mine had the same issues till I found a post on Thumpertalk.com on Carb and air box Mod. This is a good starting point on gets; 110 and 112.5 main and 17.5 pilot. But you must check spark plug coloring to make sure the jetting is correct. Check spark plug after the bike has been ridden for a wile. I also took out the stock baffle and replaced it with exhaust tip and now it fires up after a few kicks and worms up in a few minutes.
Ignition Coil Problem or the CDI. Check for both. Replace the spark plug with a new one for diagnostic purposes.. check also for the wire. I recommend using split fire wires as they're heavy duty. Check that the wires are making contact with the spark plug up to the starter relay to the battery.
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