I started to fit my SR-i900 to the bike yesterday (mainly out of boredom) and the first thing I discovered was the lack of room under the seat. The alarm itself is quite small, just a little larger than a pack of smokes but I couldn't fit it in without removing the plastic tool holder. Yamaha didn't leave any room they absolutely didn't have to. It will fit when the tool holder is removed and all the connections are right there so routing wires is no problem. I have to order the YAM 13 integration kit to make all the connections plug and play so It won't be completed for a little while but so far it looks like it'll work just fine. I'll do up some pics. when it's complete. The Scorpio is the best alarm I've found and it's a few hundred bucks well spent.