If you wish to accomplish adjustments on your CSR Trial 90 then it is always a good idea to have a Workshop Manual for personal reference in the event that you want to know proven methods to take out a particular component including Clutch and match it again properly.
CSR Trial 90 Workshop Manuals will give specified diagnostic wisdom for your vehicle therefore if something is wrong it can help you discover what the situation is and how you can correct it. You can then assess if you can do this on your own or that the job is just too big you could book your Trial 90 into a local repair garage.
CSR Trial 90 manual