With race clip-ons, your problem is not the tank, it is the side faring clearance!!
If you simply want to lower the bars, you can do that with stock ones (I take it you have an SVS?), just undo the retaining bolt on the underside of the top yoke, loosen the clipon clamp bolt and then slide the clipons down.
EDIT: ... on second read, you mean fitting SVS bars to your SVN right?? In which case, I don't think you will have any problems at all