Yamaha Athena YZ125 144cc 58mm Big Bore Cylinder Phathead version 2022-present YZ250 Kawasaki KX250 Phathead cylinder head CR85 big bore kit 400EX all years CR125R9301 Chamber selection::KX112 - 7.4cc Stock compression
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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24