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Old 09-07-2009, 03:29 PM   #12
Scot
Kneedragger
 
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Join Date: Nov 2008
Location: Va
Moto: varies
Posts: 227
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It's a dual twin because

A: It's a twin (you knew that)
and
B: It's a dual rotary valve.

I'd like to thank Walneck's for my mildly impressive ability to remember odd shit about bikes that almost never existed.
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