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Bore Diameter 54
520XSR chain: super reinforced gold-coloured Xs-Ring chains
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Large back pockets with "Oxford" reinforcements and Velcro closure
Proprietary billet components offer superior durability
BOYESEN Rad membraan systeem - Yamaha YZ85 Bore Diameter 54Boyesen engineers have applied a range of technical innovations to their range of intake systems to ensure optimal power, torque and smoothness: Aerodynamic Surface Optimization, Model Specific Reed Petal Tensioning (specific valve for each model) , Material Fuel Resistance (materials resistant to hydrocarbons) and Multi Stage Reed Timing (valves that open in stages). The BOYESEN valve diaphragms have been specially developed for each engine model
