The first break in oil change after around 100 miles, replace the factory mineral oil with a 30w conventional, no need to change the filter yet. At 500 miles you do the full service with filter then add a good quality 10w-40 synthetic.
Just to clarify, Massimo is a distributor not a manufacturer, what you own is a Linhai machine! Linhai is a manufacturing partner of Yamaha and have been building these types of machines around the world since 1994. They are designed and engineered in either the US or Japan then built in China and assembled in the US actually Garland TX, Massimo owns the US distribution rights. Bennchie used to sell the same machine but they’re in the middle of a lawsuit and that’s a whole different story. This is not a Hisun machine, the engine is basically a Yamaha so you should be able to cross reference parts!