1978 - PowerSports Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Wiseco Powersports Piston Kits 4729P1

Wiseco Powersports Piston Kits 4729P1

Piston and Ring Kit, Forged Aluminum, 3.507 in. Bore, Harley-Davidson®, Kit

Part Number: WIS-4729P1

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits 4729P2

Piston and Ring Kit, Forged Aluminum, 3.517 in. Bore, Harley-Davidson®, Kit

Part Number: WIS-4729P2

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits 4729PS

Piston and Ring Kit, Forged Aluminum, 3.497 in. Bore, Harley-Davidson®, Kit

Part Number: WIS-4729PS

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits 4730P1

Piston and Ring Kit, Forged Aluminum, 3.507 in. Bore, Harley-Davidson®, Kit

Part Number: WIS-4730P1

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4764M08750

Piston and Ring Kit, Forged Aluminum, 87.500mm Bore, Yamaha, Kit

Part Number: WIS-4764M08750

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4764M08800

Piston and Ring Kit, Forged Aluminum, 88.000mm Bore, Yamaha, Kit

Part Number: WIS-4764M08800

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports 4-Stroke Forged Series Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4767M08700

Engine Piston, Yamaha XT/TT/SR500 '76-81 12:1 CR 3425XC

Part Number: WIS-4767M08700

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports 4-Stroke Forged Series Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4767M08750

Engine Piston, Yamaha XT/TT/SR500 '76-81 12:1 CR 3445XC

Part Number: WIS-4767M08750

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports 4-Stroke Forged Series Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4767M08800

Engine Piston, Yamaha XT/TT/SR500 '76-81 12:1 CR 3465XC

Part Number: WIS-4767M08800

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports 4-Stroke Forged Series Piston Kits for 1976-1981 XT500, TT500, 1978-1981 SR500 - 4767M08850

Engine Piston, Yamaha XT/TT/SR500 '76-81 12:1 CR 3484XC

Part Number: WIS-4767M08850

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Wrist Pin Bearings B1002

Wrist Pin Bearings and Bushings, Wrist Pin Bearing, Polaris, Suzuki, Each

Part Number: WIS-B1002

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Wrist Pin Bearings B1006

Wrist Pin Bearings and Bushings, Wrist Pin Bearing, Suzuki, Kawasaki, for use on Honda®, Each

Part Number: WIS-B1006

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits for 1975-1981 XS650, 1979 XS650-2 SPECIAL II, 1978-1981 XS650S SPECIAL - 8635P80

Piston and Ring Kit, Forged Aluminum, 80.000mm Bore, Yamaha, Kit

Part Number: WIS-8635P80

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Kits for 1975-1981 XS650, 1979 XS650-2 SPECIAL II, 1978-1981 XS650S SPECIAL - 8635P81

Piston and Ring Kit, Forged Aluminum, 81.000mm Bore, Yamaha, Kit

Part Number: WIS-8635P81

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Wrist Pins S593

Piston Pin, Steel, Superfinish, Straight, 14.00mm x 44.00mm, for use on Honda®, Kawasaki, Suzuki, Each

Part Number: WIS-S593

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Wiseco Powersports Piston Wrist Pins for 1976-1983 YZ100 - S637

Piston Pin, Steel, Straight, 16.00mm x 44.00mm, Each

Part Number: WIS-S637

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Kuryakyn Dillinger Pegs 6667

Foot Pegs, Dillinger, Aluminum, Satin Black, Harley-Davidson®, Pair

Part Number: KUR-6667

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Kuryakyn Dillinger Shift Pegs 6715

Foot Controls, Dillinger, Shift Peg, Aluminum, Satin Black, Harley-Davidson®, Each

Part Number: KUR-6715

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Mustang Motorcycle Products Vintage Contoured Bracket-Style Sissy Bar Pads 79059

Sissy Bar Pad, Vintage Contoured Bracket, Foam/Vinyl, Black, 9.0 in. Height, 12.0 in. Width, Harley-Davidson®

Part Number: MMS-79059

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Mustang Motorcycle Products Contoured Bracket-Style Sissy Bar Pads 79057

Sissy Bar Pad, Contoured Bracket, Foam/Vinyl, Black, 9.0 in. Height, 12.0 in. Width, Harley-Davidson®, Each

Part Number: MMS-79057

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Kuryakyn Male Mount Foot Peg Extensions 8064

Foot Peg Mounts, Male Mount Foot Peg Extensions, 2 1/2 in., Chrome, Pair

Part Number: KUR-8064

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Kuryakyn Taillight Covers 9009

Taillight Cover, Zombie Style, Bolt-on, Steel, Chrome, Harley-Davidson®, Each

Part Number: KUR-9009

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Kuryakyn License Plate Mounting Hole Covers 3158

License Plate Mounting Hole Covers, Steel, Chrome, 3M Tape, Each

Part Number: KUR-3158

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Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Kuryakyn Thresher Pegs 5952

Foot Pegs, Thresher, Aluminum/Rubber, Chrome, Harley-Davidson®, Pair

Part Number: KUR-5952

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Biker's Choice Steering Head Cups 492769

Steering Head Cup, Trim Accent, Steel, Chrome, Harley-Davidson®, Each

Part Number: BKC-49-2769

Not Yet Reviewed

Estimated Ship Date: Jan 7, 2026 if ordered today

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Estimated Ship Date: Jan 7, 2026 if ordered today

1978 Parts and Accessories