suzuki re5

[screw]

hi all\rCan any one help. Does anyone know the size of the oil strainer cap on the right side of the engine? I want to replace it but don't want to drain the oil to get the size!\r\rI also have an original pair of tyres for the re5 if anyone is interested then contact me.\rThey have road legal tread and have been on the bike in storage for years. I do not know the history of them apart from the bike had 4000 miles on the clock as I have only had the bike a year.\r\rCheers 8)