Bought this when I was upgrading my 1098S but ended up with an RS engine that already had one of these so this is surplus to requirements now. It's brand new, comes with instructions and accessories to install it. Lighter flywheel doesn't mean more power but faster revving and more engine breaking, quicker increase and decrease of RPMs. Weight of the flywheel not assembled is about 560g and is made from alloy. This isn't a big job to install. Remove the generator cover, undo crank nut, disassemble flywheel assembly and put back together. I believe it works on several models like monster, hypermotard, multistrada, 848/1098/1198, diavel etc. Looking for £160 including postage. Forza is currently selling this for €180 which with shipping and import fees would put it at £200. Any questions let me know.