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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
What's my Black Shadow balance factor?
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<blockquote data-quote="Magnetoman" data-source="post: 94444" data-attributes="member: 2806"><p>An article in MPH by Neville Higgins (date unknown, because it's missing from the photocopy in my notebook) says <em>"The Works recommended a balance factor of 46 per cent for the Twins... I followed their advice for many years, being satisfied with the vibration levels experience by my engines, even up to 7,500 rpm on my racers... Bob Dunn... had recently done a check on a number of engines, finding those having a balance factor around 50 per cent were good, 45 per cent were OK, at 40 per cent they began to vibrate, and down to 30 per cent they were really bad. Some people running Norvins claim that a 60 per cent factor gives them a smooth engine."</em></p></blockquote><p></p>
[QUOTE="Magnetoman, post: 94444, member: 2806"] An article in MPH by Neville Higgins (date unknown, because it's missing from the photocopy in my notebook) says [I]"The Works recommended a balance factor of 46 per cent for the Twins... I followed their advice for many years, being satisfied with the vibration levels experience by my engines, even up to 7,500 rpm on my racers... Bob Dunn... had recently done a check on a number of engines, finding those having a balance factor around 50 per cent were good, 45 per cent were OK, at 40 per cent they began to vibrate, and down to 30 per cent they were really bad. Some people running Norvins claim that a 60 per cent factor gives them a smooth engine."[/I] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
What's my Black Shadow balance factor?
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