Big Bore Kits

Koso MB623002 - Big Bore Cylinder Kit

Includes ceramic coated cylinder, 61 mm forged piston, rings, pin, gasket kit and banjo bolts Compression ratio of 11.5 to 1 Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit

S&S Cycle #330-0662 - 100" Power Package - 585CE - Chain Drive - Silver - Twin Cam 88

100" Power Package Engine Performance Kit Made in the USA S&S 4.000" Big-Bore Cylinders, Piston Kits, S&S 585 Easy Start® Cams, S&S Quickee Pushrods, TC3 Cam Support Plate, TC3 Oil Pump, and Precision Hydraulic Tappets are included in this kit S&S...

S&S Cycle #330-0663 - 100" Power Package - 585GE - Gear Drive - Silver - Twin Cam 88

100" Power Package Engine Performance Kit Made in the USA S&S 4.000" Big-Bore Cylinders, Piston Kits, S&S 585 Easy Start® Cams, S&S Quickee Pushrods, TC3 Cam Support Plate, TC3 Oil Pump, and Precision Hydraulic Tappets are included in this kit S&S...

S&S Cycle #330-0664 - 100" Power Package - 585CE - Chain Drive - Wrinkle Black - Twin Cam 88

100" Power Package Engine Performance Kit Made in the USA S&S 4.000" Big-Bore Cylinders, Piston Kits, S&S 585 Easy Start® Cams, S&S Quickee Pushrods, TC3 Cam Support Plate, TC3 Oil Pump, and Precision Hydraulic Tappets are included in this kit S&S...

S&S Cycle #330-0665 - 100" Power Package - 585GE - Gear Drive - Wrinkle Black - Twin Cam 88

100" Power Package Engine Performance Kit Made in the USA S&S 4.000" Big-Bore Cylinders, Piston Kits, S&S 585 Easy Start® Cams, S&S Quickee Pushrods, TC3 Cam Support Plate, TC3 Oil Pump, and Precision Hydraulic Tappets are included in this kit S&S...

S&S Cycle #330-0666 - 110" Power Package Performance Kit - Chain Drive - Silver

110" Power Package Performance Kit Cylinder fits to piston; no machining required TC3 cam support plate and TC3 oil pump to ensure consistent oil pressure and engine longevity Includes an S&S 4" big-bore cylinder kit with 10.5:1 pistons, S&S 585 Easy...

S&S Cycle #330-0667 - 110" Power Package Performance Kit - Gear Drive - Silver

110" Power Package Performance Kit Cylinder fits to piston; no machining required TC3 cam support plate and TC3 oil pump to ensure consistent oil pressure and engine longevity Includes an S&S 4" big-bore cylinder kit with 10.5:1 pistons, S&S 585 Easy...

S&S Cycle #330-0668 - 110" Power Package Performance Kit - Chain Drive - Black

110" Power Package Performance Kit Cylinder fits to piston; no machining required TC3 cam support plate and TC3 oil pump to ensure consistent oil pressure and engine longevity Includes an S&S 4" big-bore cylinder kit with 10.5:1 pistons, S&S 585 Easy...

S&S Cycle #330-0669 - 110" Power Package Performance Kit - Gear Drive - Black

110" Power Package Performance Kit Cylinder fits to piston; no machining required TC3 cam support plate and TC3 oil pump to ensure consistent oil pressure and engine longevity Includes an S&S 4" big-bore cylinder kit with 10.5:1 pistons, S&S 585 Easy...

S&S Cycle #90-0097 - Top End Kit - 3.4375" Bore - 74" Big Twin '66-'84

Top End Kit Includes a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16" for 74" engines or 3-1/2" for 80"), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all...

S&S Cycle #90-0098 - Top End Kit - 3.500" Bore - 80" Big Twin '79-'84

Top End Kit Includes a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16" for 74" engines or 3-1/2" for 80"), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all...

S&S Cycle #900-0349 - Cylinder Heads - 91 cc - Super Stock™ - Twin Cam

91 cc Super Stock® Cylinder Heads Designed specifically for S&S® T-Series T2 long block engines for Harley Davidson® big twins and engines with S&S® 4-1/4" bore Hot Set Up installed 2.000" intake and 1.605" exhaust valves coupled with S&S® ports,...

S&S Cycle #900-0354 - 106" Hot Set Up Kit - 3.967" Bore - Wrinkle Black - Twin Cam

106" Hot Set Up Engine Performance Kit Increased fin area for better heat dissipation Increase bore size from 3.750" to 3.927" 4.375" stroke, 10.0:1 compression with stock heads Easy installation; no machining or rebalancing required Forged coated...

S&S Cycle #900-0564 - 124" Hot Set Up - Big Bore/Stroker - Wrinkle Black - 88A Twin Cam

124" Hot Set Up Engine Performance Kit For non-balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Include S&S Super Stock® 91 cc cylinder heads , 4.125” bore cylinders, forged big bore flattop pistons, S&S 4.625”...

S&S Cycle #900-0565 - 124" Hot Set Up - Big Bore/Stroker - Wrinkle Black - 88B Twin Cam

124" Hot Set Up Engine Performance Kit For balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Includes S&S Super Stock® 91 cc cylinder heads, 4.125" big bore cylinders, forged big bore flattop pistons, S&S 4.625"...

S&S Cycle #900-0568 - 124" Hot Set Up - Big Bore/Stroker - Wrinkle Black - 96/103/110A Twin Cam

124" Hot Set Up Engine Performance Kit For non-balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Include S&S Super Stock® 91 cc cylinder heads , 4.125” bore cylinders, forged big bore flattop pistons, S&S 4.625”...

S&S Cycle #900-0569 - 124" Hot Set Up® - Big Bore/Stroker - Wrinkle Black - 96B/103B/110B Twin Cam

124" Hot Set Up® Engine Performance Kit For balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Includes S&S Super Stock® 91 cc cylinder heads, 4.125" big bore cylinders, forged big bore flattop pistons, S&S 4.625"...

S&S Cycle #91-7660 - 96" Sidewinder - 3.625" Big Bore - Stroker Kit - Natural - Evolution Big Twin

96" Sidewinder Engine Performance Kit Kit includes standard flywheel assembly, 3.625" Sidewinder stroker big bore cylinder, 9.75:1 compression ratio pistons, rings and gaskets Flywheel assembly is complete with S&S heavy duty connecting rods and...

S&S Cycle #91-7661 - 96" Sidewinder - 3.625" Big Bore - Stroker Kit - Wrinkle Black - Evolution Big Twin

96" Sidewinder Engine Performance Kit Kit includes standard flywheel assembly, 3.625" Sidewinder stroker big bore cylinder, 9.75:1 compression ratio pistons, rings and gaskets Flywheel assembly is complete with S&S heavy duty connecting rods and...

S&S Cycle #91-9126 - 93" Sidewinder Big Bore Stroker Engine Performance Kit

Sidewinder Big Bore Stroker Engine Performance Kit Sidewinder Big Bore Stroker Kit Contains nearly everything needed to take a stock 74" or 80" H-D. Shovelhead engine up to 93" or 96" displacement Includes 3.625" bore high tensile, cast iron...

S&S Cycle #91-9130 - 93" Sidewinder Big Bore Stroker Engine Performance Kit- High Compression

Sidewinder Big Bore Stroker Engine Performance Kit Sidewinder Big Bore Stroker Kit Contains nearly everything needed to take a stock 74" or 80" H-D. Shovelhead engine up to 93" or 96" displacement Includes 3.625" bore high tensile, cast iron...

S&S Cycle #91-9134 - 96" Sidewinder Big Bore Stroker Engine Performance Kit

Sidewinder Big Bore Stroker Engine Performance Kit Sidewinder Big Bore Stroker Kit Contains nearly everything needed to take a stock 74" or 80" H-D. Shovelhead engine up to 93" or 96" displacement Includes 3.625" bore high tensile, cast iron...

S&S Cycle #910-0255 - Cylinders - 4.125" - Black

4-1/8" Bore Cylinder Cylinders have a stock bolt pattern Bored slightly under nominal size and are not honed Designed for 124" Hot Set Up Kits used in '99-'17 Twin Cams Wrinkle black finish with machined edges Made in the U.S.A. Requires crankcase...

S&S Cycle #910-0687 - 1200cc Conversion Kit - XL883 - Wrinkle Black

1200cc Conversion Kit for XL883 Saves time because pistons already fit to the cylinders - ready to assemble out of the box Cylinders are constructed from premium aluminum castings with cast-in iron liners No machining No re-balancing of 883 cc...