1991 Pistons & Piston Rings

Piston Rings, Piston Ring Sets, Phosphate Coated, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, for Single Piston, Set

Part Number: HSN-139S

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Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-2M5499S040

5.0 out of 5 stars ( 1 )

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Engine Piston Ring Set, 4-Cyl Ring Set; Phosphate

Part Number: HSN-665

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Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-2M4628S

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Engine Piston Ring Set, Single Cyl Ring Set; Chrome

Part Number: HSN-2C4670S030

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ProX Piston Pin 16 x 54.00mm YFS 200/YFZ 350

Part Number: PXR-04-1654

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Piston Rings, Powersports, Steel, Gas Nitrided Top, 48.00mm Bore, Kawasaki, Suzuki, Kit

Part Number: NTI-NX-20080R

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, Single Cyl Ring Set; Phosphate

Part Number: HSN-4660S010

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Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-2M4745S040

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Engine Piston Ring Set, Single Cyl Ring Set; Triple Chrome

Part Number: HSN-2C4638S

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Engine Piston Ring Set, Single Cyl Ring Set; Phosphate

Part Number: HSN-4456S030

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RING KIT

Part Number: NTI-NX-20080-2R

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Estimated Ship Date: Jan 27, 2026 if ordered today

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RING SET

Part Number: NTI-NA-50000-2R

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Estimated Ship Date: Jan 27, 2026 if ordered today

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RING SET

Part Number: NTI-NA-50000-4R

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Estimated Ship Date: Jan 27, 2026 if ordered today

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RING KIT

Part Number: NTI-NA-50000-6R

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Estimated Ship Date: Jan 27, 2026 if ordered today

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Piston Rings, Powersports, Steel, Gas Nitrided Top, 64.00mm Bore, Yamaha, Kit

Part Number: NTI-NA-40000R

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-2M4284S010

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Estimated Ship Date: Jan 19, 2026 if ordered today

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HASTINGS SINGLE RING SET

Part Number: HSN-2N4208S

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Estimated Ship Date: Jan 19, 2026 if ordered today

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ProX Big End Pin 20x45.00mm CR/RM80/85

Part Number: PXR-06-2045

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Estimated Ship Date: Jan 23, 2026 if ordered today

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ProX Big End Pin 20x46.00 mm KX60/65 '85-22 + RM65 '03-05

Part Number: PXR-06-2046

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Estimated Ship Date: Jan 23, 2026 if ordered today

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ProX Big End Pin 22x46 KX80/85/100 '98-22

Part Number: PXR-06-2246

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Estimated Ship Date: Jan 23, 2026 if ordered today

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ProX Piston Pin 18 x 58.00mm RM250

Part Number: PXR-04-1858

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Estimated Ship Date: Jan 23, 2026 if ordered today

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ProX Piston Pin 18 x 59.00mm YZ 250

Part Number: PXR-04-1859

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Estimated Ship Date: Jan 23, 2026 if ordered today

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ProX Piston Pin 20 x 69.00mm CR500 '01

Part Number: PXR-04-2069

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Estimated Ship Date: Jan 23, 2026 if ordered today

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