In all of the 9 previous bikes ive had, 8 of them ive had a datatool fitted, Never had a problem with any of them. And when quoted to various insurance companies, Ive had a good discount!. Obviously you NEED to send the cirtificate away as proof of fitment else anyone could get away with it. Anyway Grab a bargin i have it on ebay cheap

http://cgi.ebay.co.uk/DATATOOL-S4-C1...1%7C240%3A1318