Although banned, there is currently no test in Speedway being used for detecting titanium and exotic alloys, the scrutineering in GP's is basic to say the least and would probably shock most people. Titanium is as strong as steel but 45% lighter, so when used in engine components, it can make a massive difference.
Tony cheating? No I wouldn't say that, he is superbly talented and by far has the best overall package, but his advantage mainly comes from his equipment...... Like most champions, his a boundary pusher.