Yamaha Teos 125 will not start

SOURCE: bike wont start

Hi,

Initially, pls check/verify:

• left ignition coil goes to #1 & #4 plugs while right ign coil supplies 2 & 3;
• presence of spark on each and all of the plugs;
• temporarily remove the air cleaner/filter box/assembly and cover each crb opening with the palm of your hand while cranking. presence of gas would be noted with fuel on your palm;
• engine flooded. remove, clean, dry/replace plugs.

SOURCE: no spark

It sounds to me like the repair shop has connected the ignition wire ( the wire going to the + side of the coil ) to the wrong switch terminal. Take a volt ohm meter and connect the ground wire to the negitive ( - ) side of the battery and expose the ignition switch terminals. With the switch in the OFF position check for volatge on all the terminals. Make note of any terminals showing a 12 volt reading. That is probably the feed line from your battery. Turn the switch to the ON or RUN position and check for a terminal other than the one which gave you a reading before. note and mark this terminal. Locate the coil. There are 2 thin ( 18 guage ) wires attached to the coil. One goes to the distributer and the other goes to the ignition switch. Isolate that wire and reattach it to the connection on the ignition switch you marked earlier...
Good luck,
shag79

SOURCE: 2004 Yamaha V-star 650, wont start.

change the coil you may not think it got hot but sometimes a coil can overheat on the inside just enough to break the copper winding. when riding hard slow down for a couple of miles to give everything time to get back to normal temps before shutting it off

SOURCE: no spark from coils

i HAVE A 2006 V STAR 650 CLASSIC WITH A STARTING PROBLEM, COIL PACKS HAVE BEEN CHECKED OK, CDI IGNITION MODULE HAS BEEN REPLACED AND STILL NO FIRE TO PLUGS, KILL SWITCH ON HANDLE BARS BEEN REPLACED TOO, STARTER WILL TURN ENGINE BUT NO FIRE AT ALL

SOURCE: 06 ttr 125 will not start , Kill switch button

Hi and welcome to FixYa,

Since there is spark, then the only other possible missing component would be fuel. Drain the carb by loosening the drain screw. Check draining fuel's quantity and quality. If no draining fuel, then spray starting fluid to the carb air intake. The fuel cutoff valve (petc0ck) is vacuum activated. It would only allow fuel to flow if there is vacuum (i.e. when the engine is running). The irony is the engine will only start/run if there is initial fuel in the carb.

Good luck and thank you for asking FixYa.

Testimonial: "Thanks, Drain screw stripped by previous owner removed carb.bottom drained/refilled STARTED OK NOW /////////////////"