Join Date: Dec 2009
Location: central mississippi 39180
THISISBRY: that is a good guess, and may have been the fix for your issue, but the chatter chatter chatter these guys are hearing is the driveline and trans output gears racheting back and forth under a lead. is does this when you are hard on the rear brakes rapidly decellerating after doing high speeds. the load exerted on the driveline from dragging the rear tires after having the motor spun up so high is great, and causes a backlash effect in the driveline and transmission causing the gears in the rear end, axles, and trans output gears to basically chatter back and forth on each other.
will it hurt the machine? -- repeated abuse like this can most likely cause driveline failures in the future. you are basically dragging the rear wheels because the engine braking is wanting to stop the rear tires faster than the bike is traveling and once you apply the brakes it drags the rear wheels causing alot of strain on the driveline. it could lead to premature wear of the axles and roller bearings, as well as the rear chunk. the majority of the noise is from the axles and rear chunk because they take the brunt of the decelleration because they are the first link in between the rear wheels and the moving driveline.
will this bust internal gears? -- not likely. the majority of the strain when this happens is on the outward most driveline components.
is it something i need to have checked out? -- no not at all. your dealer probably cant replicate the sound cause they dont care to, and aren't gonna go chasing a bear in the woods to try and pin a bow on his head, they are gonna say nothing is wrong with it and send you back out the door. and in all actuality nothing is wrong with the bike, its just driveline chatter from dragging the rear wheels when they dont wanna stop so fast.