It's not mine chaps...
It came from the RG500 mailing list, it's only a 100bhp tune which is relatively easy and basic for the RG engine so it's no 'real' monster.
Drop in on Mark Dent at John Dent engineering - near Twickenham, London if you want to see a really mad, son-of-a-bitch RGV500 jobbie. Mark had a 150rwhp RG500 at Daytona a while back but unfortunately he set up the ignition on one cylinder with too much 'gusto' and it went pop on startup.
http://www.bikepics.com/members/nsrg500/93nsr500/
Enjoy.....
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These aren't the droids you're looking for.