I've been told by a mechanic that throttle body efi is not affected by the vapor canister mounted on the bike. 70 degree racing makes a subframe tank that looks like retains the canister mounting. So I guess it wouldn't make much of a difference to remove the equipment.
If you take a look at the fuel thread there is talk of a richer fuel map that may make a substantial difference. The key is finding a dealer willing to apply it!