My son got a 2003 XR100 recently . We felt the back wheel being alittle wobbly, and checked it out to find 5 broken spokes. First question, do we have to change all of them out, or just the 5? Second question, what special tools do we need. Third, these are 16's, and we are having a hard time finding this size seems like 17's and up are the popular ones. Anyone have a website that sells these, and can give you better directions? Thanks for any info.