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Ratchet waist closure
CNC Aerospace grade billet aluminum construction
Collars - Plain x2
Reed valve replacement for Boyesen reed valves system
They are made following the best world championship racing teams recommandations
ATHENA Cylinder Kit Ø97mm - Yamaha YZ450F (10-13) Ratchet waist closureStandard Bore Cylinder Kit Same reliability and performance of the original components Maximum durability and smoothness guaranteed by a special nickel and silicon treatment Gaskets developed with the most advanced technologies to ensure maximum tightness even at high temperatures and pressures Athena has been constantly investing in cylinder aftermarket replacement parts for more than ten years, to improve their production and performance. All the
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