My bike is an 06, Snorkel removed, Exhaust insert removed and the Grey wire is cut. I notice when doing 40mph in top gear and get on the throttle, theres a slick tick noise. It comes and goes every now and then. If i drop a gear its fine. Its almost like a pinging noise. I will hear the noise in 4th gear too if im in sand. Motor specs, Oil change every 300miles, Running Fully Synthetic. Engine has done 1800miles with no valve checking that I am aware of. I bought it at 400miles. Bike starts and runs without any hesitation. Any time, all the time. Any ideas?