clarky021

Hi I have a 2008 sherco 125 and never had a scrap of trouble with it ever.Today I rode a full trial and at the very last section(how lucky is that.) I parked the bike the bike up for 5 minutes.When I went to kick it back up it fired and started but wouldn't rev.i tried again and the same happened.I got it home and cannot seem to get a spark now.Should it be clear to see the plug sparking when kicked up?,I've checked wiring and am useless on electrics.Can anyone shed any light on what this may be please as I will no doubt have to put it in for repair and don't want a big bill if it could be something simple.A friend tells me it's normal sometimes not to see a spark as trials bikes need a good few big kicks to get it sparking( never heard that myself but).Any help is appreciated as I'm fairly new to trials and the bike has been great up till today.