Re: Hello from Canada!!
Howdy Josh and welcome.
Dunno and would hate to give you bumm advice. But could get lucky and can replace just the engine if it goes soon on ya. For the most part, just replace parts easily.
But building them is great fun! Some of the pluses of DIY is ya really know her and can feel when some thing is wrong or lose.
But the China girls can be problematic. Would strongly suggest bringing tools with you commuting. Most especially a way to remove the engine drive chain and a plastic bag to put the chain in, in case you have to pedal to work. They will run flawlessly for a long time and only fail on you when you are already going to be 5 mins late for work. Seemingly, it's the law, lol.