If you have to do maintenance on your Yamaha TT R 125 LE then it will always be a great idea to have a Workshop Manual to keep just for reference in case that you need to know simple methods to take off a certain component for example the Clutch and fit it again effectively.
Yamaha TT R 125 LE Workshop Manuals offers clear precise diagnostic guidelines for the car so if something is faulty it can help you find out what the problem is and tips to fix it. You will be able to analyse if you can do this by yourself or that the job is simply too big you can make a reservation for your TT R 125 LE in to a trusted friendly mechanic.
Yamaha TT R 125 LE manual