G.T performer 91 headset?

[earp]

i believe that some old GT's have odd size headsets does anyone in here have one or know where i can get one or maybe even a bodge

[earp]

yeh thats what i though untill i tryied to fit an 1" headset cup n found it to small n 1"8th to large i did read somthing online but i will have a proper look at it again

[earp]

thanks glen  i just need to find an old headset. sod ebay i'l get one for free, must be one floating around malvern somewhere