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<blockquote data-quote="timetraveller" data-source="post: 111040" data-attributes="member: 456"><p>130/132 sounds about right for a bike fitted with what looks to be early concentrics. Unless modified these maxed out one and three sixteenths bore. To put this into context I once did 140 mph at the end of a half mile sprint at Long Marston on a bike I had ridden to the meeting. This was not a speedo reading but rather taken from the chronometric rev counter as I crossed the finishing line. I must have under geared slightly and 7,000 rpm was showing over the line. Chronometrics have a slight lag and working back through the gearing gave speed of 140 mph, possibly slightly more allowing for the lag. This was with inch and three eighths Wal Phillips fuel injectors, remember those? Later Roy Robertson on his stroked and bored Egli achieved just under 170 mph at a timed run on a speed testing day. This is with almost everything done to the engine that can be done and with a copy of a 'George Brown' fairing which I had made on the front to give extra streamlining. There was some confusion and Roy sat up before the end of the timed run and had it not been for that he might well have achieved the 170 mark. So speeds around 150 mph are not achieved easily.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 111040, member: 456"] 130/132 sounds about right for a bike fitted with what looks to be early concentrics. Unless modified these maxed out one and three sixteenths bore. To put this into context I once did 140 mph at the end of a half mile sprint at Long Marston on a bike I had ridden to the meeting. This was not a speedo reading but rather taken from the chronometric rev counter as I crossed the finishing line. I must have under geared slightly and 7,000 rpm was showing over the line. Chronometrics have a slight lag and working back through the gearing gave speed of 140 mph, possibly slightly more allowing for the lag. This was with inch and three eighths Wal Phillips fuel injectors, remember those? Later Roy Robertson on his stroked and bored Egli achieved just under 170 mph at a timed run on a speed testing day. This is with almost everything done to the engine that can be done and with a copy of a 'George Brown' fairing which I had made on the front to give extra streamlining. There was some confusion and Roy sat up before the end of the timed run and had it not been for that he might well have achieved the 170 mark. So speeds around 150 mph are not achieved easily. [/QUOTE]
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