If you need to accomplish repairs to your Gilera Apache 125 then it is always a good plan to have access to a Workshop Manual for a reference if you want to know methods to remove a specific component including Gearbox and install it again adequately.
Gilera Apache 125 Workshop Manuals offers clear precise diagnostic wisdom on your car therefore if something is playing up it can help you identify what the issue is and how you can correct it. You will be able to assess if this can be done by yourself or in case the job is simply too big you could book your Apache 125 right into a nearby garage.
Gilera Apache 125 manual