If you need to conduct maintenance for your Yamaha TT R 90 E then it is usually a great idea to have a Workshop Manual to use as personal reference if you need to know the best way to strip off a certain part including Clutch and fit it again properly.
Yamaha TT R 90 E Workshop Manuals offers you special diagnostic information for your automobile so if something is broken it can help you find out what the situation is and the way to resolve it. Then you are able to assess if you can do this on your own or if ever the job is too big it is possible to book your TT R 90 E right into a nearby mechanic.
Yamaha TT R 90 E manual