Hi All- I'm new to the forum and recently picked up a 2000 JR50 for my 4 y/o son. The bike has not run in a couple years and the guy I bought it from told me it needed a "new top end". Overall the little bike is in good shape and complete. I plan to take the bike completely apart and clean, lube, replace or rebuild anything that is in question. If it is determined the top end is bad, what can I expect from the $89 top-end kit on ebay? I appreciate hearing anyone's experience with this parts kit. Thanks!