Got a 200 cup almost 3 weeks ago, and done almost 600 miles. Been taking it easy and changing up gear at 3,000, and now and again at 3,500 revs. I'm no car expert, but when can I start to take it further, 4,000, 5,000, 6,000 and all the way to 7,500 revs? I've read different things on various...