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KPMI replacement compression release button for your Phathead cylinder head
YFB250FW Timberwolf 4x4 YFM350ER Moto-4 YFM350X Warrior YFM400F Kodiak 4x4 YFS200 Blaster 1993
5cc 110+
Chamber selection:S31 - 17
0cc 95+T03 5
Suzuki RM85 Phathead combustion chambers Yamaha KPMI replacement compression release buttonSuzuki RM85 Phathead cylinder head kit 1991 2021+ Chamber selection: S01 6. 9cc StockS02 6. 4cc (95+ octane)S03 5. 9cc (100+ octane)S04 5. 6cc (105+ octane) 53mm 105cc big bore