I've noticed over the past few months that my dirt bike ('03 KLX 400R) has developed a "growl" that emits from the lower engine area, most noticeable on decel. Just recently the growl has become MUCH more noticeable. So while home for lunch today I drained some oil out of the engine and sadly found the oil to be filled with a very fine gold'ish colored glitter. Guess I can't put it off any longer. So what all should I consider replacing while the engine is torn apart? Engine has 500 (hard) hours on it.