Dead battery?

[Val]

Probably you need new battery. Bump start or jump start it and charge the battery riding.

Or buy Oxford Oximiser 900 for £30 pounds and charge it. On all my bikes I have the Oximiser connected all the time. It makes your battery last longer.

After you charge the battery test it.

Load Test

• Adjust voltmeter to DC volts (20 volt range).
  
• Place voltmeter leads to the battery terminals. (positive to positive and negative to negative)
  
• Watch the voltmeter as you start your motorcycle. Keep the starter pressed at least 5-10 seconds
  
• If the voltage drops below 9.5 volts during that 10 seconds, the battery has very low capacity and should be replaced.
  

A healthy 12 volt motorcycle battery should maintain a range from 9.5 - 10.5 volts under the load for a good 30 seconds straight.

http://www.yuasabatteries.com/faqs.php?action=1&id=30