Just reciently for the last 7 times i have ridden my bike it has been making weard vibrating noises when i have been going faster than 22mph. I know I can go faster than 22 mph but for that reason I go less than 22mph. I checked every thing on my bike, even the chain, and it was none of that stuff. So I decided it was the motor. Which a day ago I found out I was right. By putting my ear next to it, listening when it was iddling. It seems to come from the carberator. But also mabe from the big main gears on the side of the engine behind the metal cover. What should I do?