Saw a rear sprocket on fleabay made by PBI. an aluminium one advertised to fit the gb500.
was wondering if the pattern is the same as xbr? I have a front hub for the gb and was hoping to fit some spoked rims to my xbr this winter but funds are short and alas I have to run the comstars for another season but I reckon they look pretty cool anyway.
Shiny things are awesome. .......