ALPINESTARS Zaca Air Jacket - Black/White/Red - Medium 3306423-1231-M Gen 2 NH Series Upper Cut Mufflers Protective and comfortable Nucleon Flex

Protective and comfortable Nucleon Flex Plus armor is highly flexible and adaptive and has a thin profile for optimum rider comfort

Up to a 20% gain in horsepower is achieved on your Yamaha WR250 while eliminating weight

Super-lightweight

Insert spacer between cylinder and reed valve

ALPINESTARS Zaca Air Jacket - Black/White/Red - Medium 3306423-1231-M Gen 2 NH Series Upper Cut Mufflers Protective and comfortable Nucleon FlexLarge 3D mesh panels with mechanical stretch Tech Air Ready 450D polyfabric frame chassis Detachable hood, made with air extraction channel to provide ventilation Detachable 2L waterproof liner Stretch softshell inserts in key areas New inner construction for Nucleon protection insert upgrades and ready to accommodate the new long back protector insert Waterproof compartment External DFS lite shoulder protectors Waist adjusters Nucleon Flex Plus armor