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- Stock crankshaft flywheel assembly is for 80" Evolution models only, aseembled and trued with shafts at our V-Twin motor shop in New York
- This assembly features a late type sprocket shaft, early style pinion shaft, a narrow sprocket side flywheel and replaceable pinion & sprockt shafts
- Required to use with 1987-up type pinion shaft bearing and retaining ring
- Fits 1984-1990 Evolution Big Twin models
- Replaces OEM: 23906-90