Reply to thread

Message: [QUOTE="jaguar, post: 663486, member: 19340"] Everyone says these engines rattle and I was thinking of why that might be. I'm not sure of the construction of the newer KDX engine power valves but in my bike there is a "wave" washer (that can be compressed) backing up the center valve and I was thinking the expanding/burning air/fuel mixture (when the piston gets below the top of the exhaust port) could be pushing back the valve and either when it retreats or when it rebounds (or both) it could be causing the annoying sound as metal hits metal. What do you think? [/QUOTE]