Agree with very limited mods.
If too many are allowed, then you might as well use 900SS's - no ground clearance problems and fully adjustable suspension etc. without spending anything.
Any exhaust, any footpegs.
Internal mods to original forks.
Any rear shock. or better still allow any mods to the original (assuming they are the rebuidable type)
No engine mods.
Off you go - let battle commence.
[Edited on 7-10-2004 by STEVE M]