I don't have one in my 500, but I'm going to get one soon. I have been running one of these in my crf450 for the last 4 years and it works great, it can take a lot of abuse. Always wanted one for the 500, but they cost to much. Now that they have droped the price, I'm going to get one. There is a new guy running rev-loc, his name is allen. He is very nice and helpful.