Over on ThumperTalk.com someone has already installed an IMS wide ratio transmission in the CRF. The problem is IMS has stopped manufacturing this kit. It has been suggested that the Honda CRM 250 a bike that is not sold in North America might have a wide ratio tranny that could be grafted into the 450. Does anyone know anything about the CRM 250, maybe a partsfiche or a service manual. Eric any ideas on this?