Thread: Secondary airbox??
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  # 7  
Old 16-01-17, 05:57
Petenz Petenz is offline
XT-Moto SuperStar
 
Join Date: Dec 2011
Location: Christchurch , NZ
Posts: 1,016
Petenz is on a distinguished road
Yamaha called them boost bottles...
were first seen on the YZ motorcross
& IT Enduro bikes early 80s..




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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...