There are many in fact, you should have a good knowledge of all the parts of an Two wheeler so that you are not stumbled when mechanics come and ask for a friction plate , neutral switch etc…

Next is to establish a good rapport with mechanivs and service centre in the locality where u are planning to open a shop.

These are some of the basic and must do if u are able to check these, the next steps are contacting every OEM, finding a good place for your shop, Maintaing proper log of spare parts bought and sold…

Good luck. Hope my answer was helpful✌