- For models with Screamin' Eagle Hydro Clutch - Stock 36 tooth primary chain drive sprocket - 84 tooth starter ring gear - 10 tooth pinion gear - One-piece forged 7075 hard anodized aluminum - Hard anodized finish for durability and strength - Compatible Screamin' Eagle Hydro Clutch clutch components - Ready for street or track - Complete with clutch hub bearing and starter ring gear - See fmc-552-009 for replacement bearing clutch basket.