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Sterilgarda Yamaha YZF-R1 World Superbike Picture 9 of 16

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Photo 9 of 16
The rear swingarm is designed by engineers to be about 25% stiffer than stock to give the Spies a firm feel at the rear of the Yamaha.

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Alex - rider  February 25, 2010 01:21 PM
That's a beautiful piece of machinery
Luis - R1 Aficionado  February 1, 2010 08:21 AM
mpa - bike  January 1, 2010 06:29 AM
the most beautiful bike!!!
GSX-R Rder - Spies's R1  November 30, 2009 11:58 AM
Absolutely beautiful! Incredible bike!