Today when I took a curve at around 65mph in OD, there was a loud clacking noise, like the bike was trying to shift. I then dropped to 5Th and then back to OD thinking I had missed a gear. The noise and the bike attempting to change gears continued until I dropped down to 55mph. But everytime I rolled on the throttle beyond 55mph, it started again. Hope this isn´t expensive to correct.