Help bike won't run

jpandflissy · Aug 24, 2018

Hi everyone. I am at a loss.
I have an 03 tuono. Was running fine the other day, come the morning it starts and runs for about 2 or 3 seconds and stops. If I try and use the fast ideal or throttle it won't start, only starts if I touch nothing and again it stops after 2 or 3 seconds.
It was suggested it may be the tip over switch but I have measured the resistance and it is within specs. Any help is much appreciated as I am at a loss.

TommyT · Aug 29, 2018

jpandflissy said:
Hi everyone. I am at a loss.
I have an 03 tuono. Was running fine the other day, come the morning it starts and runs for about 2 or 3 seconds and stops. If I try and use the fast ideal or throttle it won't start, only starts if I touch nothing and again it stops after 2 or 3 seconds.
It was suggested it may be the tip over switch but I have measured the resistance and it is within specs. Any help is much appreciated as I am at a loss.

If it fires then its not the tipover switch or probably any other ignition issue. My first guess would be the fuel pump. Sounds like it is priming the fuel line but not keeping pressure once running. Fuel pump failure is relativly common. change pump and try again.

Hessler · Mar 24, 2019

the engine would work if you disconnect it I think. just flashes something on the clocks. try that.
or if you have put the trip over upside down.
could be wrong but no harm in trying

TommyT · Mar 28, 2019

TommyT said:
If it fires then its not the tipover switch or probably any other ignition issue. My first guess would be the fuel pump. Sounds like it is priming the fuel line but not keeping pressure once running. Fuel pump failure is relativly common. change pump and try again.

[emoji106]

TommyT · Mar 28, 2019

Hessler said:
the engine would work if you disconnect it I think. just flashes something on the clocks. try that.
or if you have put the trip over upside down.
could be wrong but no harm in trying

No it won’t!

mcdaddyfubar · Apr 26, 2019

Some tests you could try before swapping parts:

Check you have battery voltage at pump plug.

Check resistance between the two outside pins going to pump - should be under about 1.5 ohms.

Disconnect the qd on the fuel return pipe after the pump primes, you should get a decent pour out of it if the pump is supplying sufficient pressure.

Help bike won't run

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