· field specimen
Honda CR500 Phathead compression release Combustion chambers Chamber selection:H52 - 62.5cc (100+ octane) YFB250 Timberwolf 2x4 YFB250FW Timberwolf Yamaha Chamber Selection:SX86-10 (100+ octane) 2025+ Heads will ship when CR125R9301
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Ships within 48 hours · Estimated delivery Sep 17 - Sep 22