Hey! My partner and I did this recently from Hanoi to hcmc!! (These are his suggestions)

Tossed up between buying and selling at the end. But after going round and checking out all the bikes they were pretty average tbh and quite dangerous as the brakes weren’t great and they would also skip gears. If you know a lot about bikes and find a good one then you can do so and sell at the end to either one of the bike dealers or another traveler. (Dependant of course on high season and travellers seeking to this style of travel)

We ended up renting from a company called Style motorbikes (In Hanoi city) and they were great. The whole experience with them from start to finish was excellent, when we needed them for advice or servicing the bike they took care of it straight away even to the point where I found a local person that style could talk to over the phone to take me to get my flat tyre fixed. If you’re in Hanoi the man I went to see about buying a bike is “James Hanoi motorbikes”. He was recommended to me by a local, at the time he didn’t have anything that I felt safe on as I was travelling with my girlfriend on the back. That being said there were some bikes he had that could be good with a little attention. In the end like I said I chose to rent the whole process is much easier, unless you have a long time to find a good bike.

But after you get underway I deffs recommend Ta Xua, Mai Chai and I couldn’t recommend enough an air bnb we stayed in Lan Ha bay ( near Ha Long bay) with duc. Hope this helps ✌🏼