Give as some details what exactly happened,maybe we can help.
With the ( bamm ) you mean that you heart a mechanical noise as something that breaks?
_________________
Owner of : Honda NSR250 MC28 95sp colours / Honda NSR250 MC18 R6K SP / Honda RS250 NF5 89 in boxes
/ Honda C50 12V cub / Honda C50 12V super cub Japanese version /Yamaha XT600 89 benetton