Here's a wonderful way to spend some time while the boss isn't around!
Listen to the amazing selection of classic bike sounds on Nigel Wynne's Vintage Bike site.
He's got everything from a 1949 Norton to the 1965 Hailwood Redman pitstop, the 1973 Norton Commando and much more. http://www.vintagebike.co.uk/Sounds.htm

Cheers, Harry