If you want to undertake adjustments on your Yamaha FZR 400 R Genesis then it is always a good idea to possess a Workshop Manual for a reference in case you want to know ways to strip off a particular component including Gearbox and match it again effectively.
Yamaha FZR 400 R Genesis Workshop Manuals provide you with special diagnostic info on your car or truck therefore if something is faulty it will help you ascertain what the problem is and tips to correct it. After that you can evaluate if this can be done on your own or that the job is just too big you can book your FZR 400 R Genesis in with a nearby friendly mechanic.
Yamaha FZR 400 R Genesis manual