If you want to try racing but not quite decided might be worth a look at the Yamaha Past Masters taster weekend starting in 2012.
http://www.youtube.com/watch?v=zH-QhbBb1bc
Racing taster weekends
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MZ club are also running their race experience scheme in 2012
http://www.bmzrc.org.uk/MZExperience/ta ... fault.aspx
http://www.bmzrc.org.uk/MZExperience/ta ... fault.aspx