Rich ... it may be the case that this was back when standards were higher so even bike speeding was considered bad enough form for a Special to be no longer considered suitable for duty!
My guess is the loophole exempting bikes from speeding will be closed in due course ... improvements to bike tech and the seeming love Councils have for speed limits you could nearly break running may force the issue. Even if the Speedo issue proves difficult to implement then declaring that exceeding the limit will be automatic grounds for a dangerous riding ticket will do the same thing by default and cause riders to err on the side of caution
K
K that makes a lot of sense to me.