The ACU guide to buying secondhand Bikes I have attached a PDF of the guide of what to look for with Regard to Frame and Engine numbers when buying a secondhand Race, Road or Trackday bike I was given a nice gloss copy a couple of years ago to allow me to check correctly at Technical Control The attached copy differs in that where as mine has a ACU logo at the top right of the cover this one has a Bemsee club emblem |