If you choose to accomplish auto repairs to your Yamaha RD 250 LC then it will always be recommended to own a Workshop Manual to use as personal reference just in case you need to know techniques to take off a particular component including Gearbox and install it again correctly.
Yamaha RD 250 LC Workshop Manuals offers clear specified diagnostic guidelines on your car or truck so if something is broken it helps you work out what the problem is and some ways to fix it. You can then determine if this can be done by yourself or if ever the job is too big you are able to book your RD 250 LC right into a suitable car garage.
Yamaha RD 250 LC manual