This is a bike I saw at Barber Vintage Fest 2012. Unfortunately I can't remember what model it was - maybe a W650? I do know it was running a 1.50" header into a 2-1 collector. Then a single "Stubby Can" muffler of 2" inlet. Part number of muffler is MC-CAN200300-SS and the collector is a CL2-1520-SS.