Honda XR 125 2005 model

[nugnovadosed]

Hello,

my friend recently got a honda xr 125 2005 model and the bike wont start, the starter motor does nothing. we have tried running power straight to the starter motor and the starter motor spins over fine and turns the engine over but it just refuses to when you use the starter button.

another of my friends has the same bike and kindly let us butcher bits off it to eliminate causes and this is what we have done so far.

we bypassed the killswitch and stand switch and made sure the neutral switch was wired up but still nothing

we swapped the battery over and fully charged the old 1

we swapped starter solonoids

we swapped the cdi box over

it did exactly the same thing

we dont know what else to try, all the ignition comes on when you turn the key and the lights, when you press the starter button the front light dims quite a lot but my friend says it does exactly the same thing on his bike so i think thats normal. the starter motor doesnt even click when you press the button which we read on google is usually the way to tell its a starter motor problem

Anyone got any idea's?

Thanks in advance

[groovylee]

checked all the earths?
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Past - 1988 honda revere 600, 1996 kawasaki gpz500s, 1999 Yamaha R6

Current - 2002 Aprilia RSV1000R & 1999 Kawasaki ZX6R

[nugnovadosed]

[Nemo]

[nugnovadosed]

Its on with 1 of the bolts that holds the starter motor onto the engine. My mates bike was wired the same way and his works fine. I assume the start button has some sort of connection because when u press it the front light dims.

Iv just stripped the bike again and cleaned up the earth on the coil and its made no difference

[Nemo]

I guess the next job will be looking at all the safety switches.

I assume all the fuses are ok?

Do you have a multimeter for trouble shooting, or just going to try change every possible part?
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Previously owned: Kawasaki KH125, Suzuki GP125, Suzuki GX 125, Honda CB125 TDC '83, Honda ntv 600, Kawasaki ER5, Kawasaki ZZR600, Aprilia RSV 1000 Mille
Now own: Ducati 848 evo

[nugnovadosed]

[nugnovadosed]

We just took it out and it starts on a bump so kill switches aren't an issue

[mauzo]

This might be the right wiring diagram…

The starter button does two separate things: it cuts the headlights, and it sends live to the starter motor. If one half of the switch is fucked (or has a bad connector) it will just do one of those things. If that wiring diagram is right, get a multimeter (or a battery-and-bulb) and check continuity between black/brown and yellow/red when the switch is pushed. If you don't get continuity, try cleaning up the contacts and spraying the switch with contact cleaner.

You can also try checking for a voltage across the starter motor terminals when the switch is pushed. If you don't get 12Vish then power isn't getting to the motor, and there's no reason to think there's anything wrong with it.
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'04 CG125, '07 CBF500