Ride legal, insured and helmeted
Foreigners are fined exactly like locals — licence, insurance, fastened helmet.
Anything above 50cc needs a licence Vietnam recognises: an IDP under the 1968 convention, or a converted Vietnamese licence. Without it your insurance will decline the claim, which matters far more than the fine.
Source Official — Vietnamese decree
Use app rides and check the plate
Xanh SM, be and Grab price the trip up front — match the plate to the app before getting in.
App fares remove the negotiation and log the driver, which is what you want at 2am or at the airport. If the plate does not match, cancel; the app will not penalise you for it.
Source Community-reported
Don't ride after any alcohol at all
Vietnam runs a zero-tolerance regime and insurance may be void.
The legal limit is zero, roadside checks are frequent and evening-heavy, and fines are steep. An accident with alcohol on your breath typically voids both your motorbike and your travel insurance — take a Grab.
Source Official — Vietnamese decree
Don't take unmetered taxis or driver 'recommendations'
Commission steering and fare-padding are common — insist on the meter or an app fare.
A driver who offers a restaurant, tailor or tour is earning a commission, and it is added to your bill. Agree the fare or the meter before the doors close, and choose your own destination.
Source Community-reported
Don't ride or drive through floodwater
You can't see open drains, missing manhole covers or dropped cables underneath.
Brown water hides everything, including live cables. Da Nang drains fast once rain stops, so waiting an hour is almost always the better decision — and a hydrolocked engine is on you, not the rental shop.
Source Official — embassy advisory