Today out with my pals who all ride r1s gixers and the like I was flying on my berg fs650 sm setup when riding at a bit pace in 5th suddenly a big drop in power then I pulled clutch in to change down and engine just stopped let clutch back out and berg pretty much locked up???? Please help I've only owned 2weeks and only done about 120-30 miles in 4 outings it's a 52 fs650 . I need to no what it could be and who the best to fix and of course the Killa HOW MUCH!!!!! Also im in the north east of england Thanks kind people