In Stock
- In Stock Items. Ships Today. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (9) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (135) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Model
Part Type
- Powersports Top End Engine Kits (107) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Crankshafts (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Full Engine Kits (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Cylinders (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
Filter Options
- PowerSports (135)
Savings Central
- Free Shipping (13)

Selected Filters

Availability

- In Stock Items. Ships Today. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- In Stock Items, Including at a Supplier. Ships In a Few Days. (9) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (135) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Make/Model
Part Type
- Powersports Top End Engine Kits (107) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Crankshafts (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Full Engine Kits (10) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Powersports Cylinders (8) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
Filter Options
- PowerSports (135)
Savings Central
- Free Shipping (13)

HARLEY-DAVIDSON Engine Kits & Rotating Assemblies

Individual Parts

Part Groups

Results 51 - 75 of 135

S&S Cycle 93 in. Sidewinder Big Bore Stroker Kits 91-9126

S&S Cycle 70-84 BT 93in Sidewinder Big Bore Stroker Kit - Gloss Black

Part Number: SSY-91-9126

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 93 in. Sidewinder Big Bore Stroker Kits 91-9130

S&S Cycle 70-84 BT 93in Sidewinder High Compression Big Bore Stroker Kit - Gloss Black

Part Number: SSY-91-9130

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 124 in. Big Bore Kits 910-0681

Top End Engine Kit, M8 124 in. Big Bore, Wrinkle Black Finish, 4.250 in., Forged Piston, Harley-Davidson®, Kit

Part Number: SSY-910-0681

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 128 in. Big Bore Kits 910-0685

ENGINE PERFORMANCE, M8 MODELS W/114", 128" BIG BORE KIT M8 BLK

Part Number: SSY-910-0685

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 128 in. Big Bore Kits 910-0733

128" BIG BORE KIT M8 BLK

Part Number: SSY-910-0733

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 131 in. Big Bore Kits 910-0764

PERFORMANCE, 131" KIT - BLK GRANITE M8

Part Number: SSY-910-0764

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 129 in. Big Bore Cylinder Kits 910-0843

S&S Cycle 2017+ M8 Models 129in Big-Bore Kit 4.375in Stroke Highlighted Cylinders

Part Number: SSY-910-0843

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 129 in. Big Bore Cylinder Kits 910-0844

S&S Cycle 2017+ M8 Models 129in Big-Bore Kit 4.375in Stroke Non-Highlighted Cylinders

Part Number: SSY-910-0844

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0845

S&S Cycle 2017+ M8 Models 4.5in Stroke 132in Big Bore Kit

Part Number: SSY-910-0845

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0846

S&S Cycle 2017+ M8 Models 4.320in Bore 4.500in Stroke Cylinder Kit - Wrinkle Black w/o Highlight

Part Number: SSY-910-0846

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 132 in. Big Bore Cylinder Kits 910-0847

S&S Cycle 2017+ M8 Models 4.320in Bore 4.500in Stroke Cylinder Kit - Black Granite w/ Highlight

Part Number: SSY-910-0847

Not Yet Reviewed

Estimated Ship Date: Feb 25, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 25, 2026 if ordered today

S&S Cycle 111 in. Hot Set-Up Cylinder Kits 910-0025