Thank you for that. The route I am suggesting on that link I posted above has you turn from the Sukhumvit Highway at Laem Chabang onto Route 7 for just a very short distance. But it looks like you then switch to 3702 before the toll booth. Route 3072 is the motorway frontage road which is fine for motorcycles it seems. It looks like it then turns into 1073 for a short distance, then into 361 for another short distance, then 34, and then finally the Bang Na Trad potholed ground level road that you mentioned. Although this route sounds like many different roads, it looks like more or less just a straight line on the map with a few quick interchanges.
Otherwise, if you take 3 to 34, it looks like a lot of local roads and a longer distance that could add almost another hour to the travel time, depending on traffic lights and traffic.
What I’m still trying to figure out is if the way I used to travel by motorcycle from Pattaya to Bangkok can still be done. It was very quick. All highway roads.
The route I took was that I got onto 7 by North Pattaya, stayed on that for a while, and then turned off and onto the Chonburi bypass road right before the Motorway toll booth. Then the bypass road took you right to the Bang Na Trad road.
What I fear is that they may have moved the toll both closer to Pattaya now, which would prevent you from being able to reach the Chonburi bypass road from 7. This would then render my old route impossible, but I can’t seem to figure out for sure if it’s still possible or not. If I could still take this old route then it could save at least 30 minutes.
I actually see lots of motorcycles getting onto 7 by North Pattaya at present (despite there being a no motorcycles permitted sign there at the entrance), but they might only be traveling a very short distance and getting off before the toll booth and/or getting off before where the bypass road connects to 7.