Alibaba got it in one...
Sorry to hear you're having problems... have you checked all 4 plus or just the two you can see without delving under the tank ?
However I had the same symptoms on my RD04 whilst in Jordan / Syria the road south from Madaba ..I had it when riding up hills the bike would splutter, backfire and loose power… I was quite low on fuel, so I completely filled the tank at a busy modern fuel station, hoping they would have clean new storage tanks.. I then loosened my fuel filter and turned it 180d hoping to find a cleaner half in the filter… after that no problems at all .. Since replaced the fuel filter.
Remember some of the gas stations you’re visiting never have the tanks checked or emptied, if you’re one of the last to take fuel from their under ground tanks, believe me fuel is not the only thing your getting…
Before damaging the bike, take the tank off, empty it completely … change your fuel filter, easy enough to find.. whilst the tank is off check all 4 of the spark plugs.. try with decent new fuel…have a good look around for split rubber including loose circlips
If you are really stuck, I fully recommend the Honda bike garage back in Antalya… speak with the service manager, Senol Bahttyar, he speaks good English. The garage address is Sinan Mah. 1250 Sok No 7 Antayla +90 0 242 311 83 13
Otherwise tell me where your heading and I’ll look for bike garages..