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TW 125 starting problem

5806 Views 9 Replies 4 Participants Last post by  uktw125
My TW 125 is not starting up and I'm having trouble locating the problem.

I press the ignition switch and the only form of life comes from the starter relay clicking. The battery is charged to capacity (verified by a multimeter and full bright light when using the ignition).

Wondering if anyone has any ideas or past experience with this kind of problem?
1 - 3 of 10 Posts
Connect your multimeter to the battery, voltage should be over 12V, then turn on, press the starter and see what the voltage drop is. If it goes down to 9-10 volts it's the battery.

Also check the terminals are clean and tight.

When you have fixed it don't just disappear, let us know because it helps other with a similar problem.
New batteries should be charged fully before use. It will be stronger and last longer.
Could I replace the starter motor with one from a different Yamaha bike? Because the XT 125 starter motor looks exactly the same as a TW 125s.

I don't know about the newer XT125's with electric start, I think they have a different design of engine.

(I may be wrong there)

But if your looking for second hand I am fairly confident that an SR125 starter will work or an XT225 Serow.
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