I have for sale this manual cam chain tensioner (CCT). Factory MX is the brand and it is new. It'll fit both the CRF 250 and 450 models. A friend sold it to me a while ago and I never got around to using it. Part is located in Suisun City and can be seen most any day from 9am-9pm. Call, text, or email to set up a time to come check it out.