Ok don't bash me for posting this if you guys already know. I just bought an all balls chain roller for a 300ex today and it fits perfect on the 350x, what a relief. Now my chain isn't sliding on the swing arm and I don't have to shovel out the big bucks for an oem slider. So for you guys who are missing it like I was, this is the cheapest route to go unless you can get a good deal on an oem piece. Just lettin you guys know. Later.