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Athena 295cc 72mm Yamaha YZ250 YZ250X WR250 Phathead cylinder head kit 1999-2026 Chamber selection:AY20 - 20cc (105+ octane) ECU remap required for best Honda Chamber selection:H34 - 17.4cc (110+ octane) Kawasaki KX500 Phathead cylinder CR125R9301

USD212.50 USD249.50
4.5 SKU 24920847699 inspection-training.be

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Description

Athena 295cc 72mm Yamaha YZ250 YZ250X WR250 Phathead cylinder head kit 1999 2026 Chamber selection:AY20 20cc (105+ octane) ECU remap required for best Honda Chamber selection:H34 17.4cc (110+ octane) Kawasaki KX500 Phathead cylinder CR125R9301 ECU remap required for best performance message or call for details The material is stronger and transfers heat better than cast aluminum

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