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Old 10-13-2011 | 02:14 PM
  #2350  
Chris Peralta's Avatar
Chris Peralta
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Joined: Nov 2009
Posts: 1,192
From: Colorado
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The X11 would be the closest RB to a +4 IMO.

The only difference between the X10 and X11 is the crankcase and the etching on the cooling head. I put a ceramic bearing in the X11 I have and it really woke the engine up and the fuel economy improved as well.
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