I purchased a TM Designworks chain guide last year sometime and have been running it on a 2006 yz450f, I am pretty pleased with it but I am unsure whether it is the correct one of my bike, the packet it came in has the correct product code and it says it fits my bike on the label. It also looks the exact shape as the one on their site apart from the cut outs are triangles. See my photo - This is what they appear like on their site for my bike This seems to be similar to what I mean on this rm, pictured on their main page when you open their site, it has triangular cut outs rather than the circular ones..... I have emailed them already asking but it seemed they didn't understand me very well, anyway I hope one of you fellas knows, I know its nothing major they have probably just updated their design or something, but I wanted to make sure as to prevent me damaging anything running the wrong part. I also have bad OCD !