Yamaha Athena YZ125 144cc 58mm Big Bore Cylinder Phathead version 1998-2000 and 2001-2021 CR500 or 2023/2024 with big bore CR125R9304 Chamber Selection:F13 - 6.0cc (100+ octane) These heads are TPI YZ250
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Ships within 48 hours · Estimated delivery Oct 12 - Oct 17