The 1975 CR250 was an upgrade of the 74 but failed to keep up with the RMs and YZs of the day. They made it an up pipe bike with several improvements to the 74 including the tranny but it was not a great effort. The power band is pipey compared to the 74 which kinda ruined its reputation. I have a couple of em and they are cool enough when restored. It is still a fun bike to ride in Vintage with parts being more available for Hondas than other makes. DC plastics is working on fenders right now. Contact them also for seat cover. Try AMSracing for seat foam, air filter etc. I have gaskets if you need them at
mailto:elsinorestuff@qwest.net. You can find almost any part for this model new or used but be patient.