1. Will this shock fit the mx500 razor dirt bike?
2. What is the weight limit for the shock?
3. What is the distance lengthwise on the eyelets?
This does not appear to be compatible with the MX500. The manufacturer has not provided us with a weight limit, and the specifications we have for this shock can be found in the Description section of this page. If you are looking for a replacement shock for an MX500, take a look at item E41-4908, which we have confirmed as compatible with that model.