If you need to do fixes to your Harley Davidson SX 175 then it will always be a great idea to have access to a Workshop Manual to keep just for a reference in case that you want to know the way to remove a specific part including Gearbox and install it again accordingly.
Harley Davidson SX 175 Workshop Manuals will give specific diagnostic guidelines for your automobile therefore if something is broken it will help you find out what the issue is and easy methods to make it better. After that you can determine if you can do this on your own or if the job is too big you are able to make a booking for your SX 175 into a nearby repair garage.
Harley Davidson SX 175 manual