If you need to execute auto repairs on your own Giantco Athena II 125 then it will always be recommended to have a Workshop Manual to keep just for a guide in the event you want to know proven methods to take out a specific part like the Gearbox and match it again correctly.
Giantco Athena II 125 Workshop Manuals offers you specific diagnostic info on your car or truck so if something is faulty it can help you work out what the issue is and the best way to correct it. Then you are able to evaluate if this can be achieved yourself or that the job is simply too big you are able to make a reservation for your Athena II 125 into a suitable garage.
Giantco Athena II 125 manual