I picked up a xr200r roller for cheap and the rear shock had gone into pogo mode. I pulled it down and found it still has a little air in the bladder and a fair bit of oil. When inspecting the shim stacks one of the washers in the stack had a hole blown through it which allowed oil to bypass. I cant find a shock seal for it but it measures up at 14mm shaft and 40mm bore. Will any seal head of this size work or is the early xr200 shock a strange beast?