Hi, I am getting a Robin Subaru EY28 fuel tank to replace an old Honda G400 tank that had rusted out. I just have to knock up a raised adapter plate so I can mount it on top of the engine, which should be easy considering these tanks mount flat.
Can anyone familiar with Robin Subaru please tell me the thread diameter and pitch on the EY28 fuel tank bolts?
I did some research and it looks as though all four are an M8 diameter, but can anyone tell me the pitch? They look like fine thread to me but I'm not sure. At a guess I would say 8mm X 1.0 but I really need to be sure so I purchase the correct thread nuts. It looks like the bolts on the EY20 and other Robin Subaru tanks are the same. The original nut is a non-serrated flange nut, part number 0023808000, but I'm sure I could just use ordinary nuts and add a washer.
