Thread: Exhaust sound not usual
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  # 4  
Old 11-07-13, 22:02
Pleiades Pleiades is offline
XT-Moto SuperStar
 
Join Date: Aug 2010
Location: North Norfolk
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Pleiades is on a distinguished road
If it's been blocked is very likely to have been done like this...

http://www.xt660.com/showthread.php?t=11113

Not so sure about a "whistling" sound, now you describe it like that?