Trophy cutting out

Hi, I have a Trophy 1200 that has started dying as soon as it gets warm. Its not a fuel problem. Def losing all sparks. Bike starts again after ten min. RAC guy said it was the coils so fitted new but prob remains. Would be grateful for any ideas. Cheers.

 

Thanks screwball, have cracked it via a mate who had the same problem on his Thunderbird. It was a duff coil pick up sensor, forty quid from Sprint and quite easy to replace, took longer to get the fairing off and back. Good to have got it sorted. Thanks again.