Anyone tried one of these yet? I'm thinking of ordering one just to see if it works as he says. I am sure with some type of motion switch it could be done and it is a good idea.
http://www.ebay.com/itm/Motorcycle-taillight-downshift-activator-only-99-cents-/120759940263?hash=item1c1dda74a7&item=120759940263&pt=Motorcycles_Parts_Accessories&vxp=mtr