Oscillation trepidation !

[Duncan Grimmond]

Hi Andrew, I hope you get this sorted. I had a similar problem with the Pembleton Brooklands which would suddenly develop steering wobble at 58mph but only on perfectly smooth fresh tarmac. Wheel balancing, rim truing, steering rebuild, new steering damper, swapping wheels diagonally and laterally made no difference. Eventually it went away without explanation.
PS, thank you for using dismantling and not the ghastly Americanism "dis-assembling" that seems to be in fashion at present.