[High_Revs_17]

Those are overkill for you especially for your size, change them out and get some more track time in before the GP race so you can get used to running the bike the way it should be. You'll most likely be slower at first due to your being used to the stiffer setup, but after that feeling subsides you'll start turning even faster lap times providing the bike doesn't have any tire or chassis issues. The softer springs will also help in the bumpy sections more so than the previous setup, and if you feel the need just stiffen up the rear a bit so the tire can get a bit more bite on the turn's exits.