Speedometer isnt working!!!

I was off to a nice afternoon ride, didn't make it to the next bloke!!!
lost control around a bend, luckily after hitting the kerb skidded on the grass not on pavement, "MIRACLE"
Result: Broken indicator, small crack on the fairing and speedometer faliure...
Lesson: Respect the corners/ bends specially on cold tyres, give riding 100% concentration!!
How can i check wats faulty? cable guage or something else on the speedometer?
lost control around a bend, luckily after hitting the kerb skidded on the grass not on pavement, "MIRACLE"
Result: Broken indicator, small crack on the fairing and speedometer faliure...
Lesson: Respect the corners/ bends specially on cold tyres, give riding 100% concentration!!
How can i check wats faulty? cable guage or something else on the speedometer?