I have a 2003 YZF450 and need help. I was riding over the weekend and my 450 was running fine until I landed from a jump and it made a horrible clanking sound. I pulled in the clutch and came to a stop and the noise went away. The bike runs fine and goes through the gears but when slowing for a corner or shutting off the gas it makes alot of noise. It sounds like it is coming from the front sprocket or transmission. It sounds worse than chain slap but I am not sure. Has anyone else had this problem? Thanks.