Parts-Engine-Big Bore Kits

Explore big bore kits for motorcycle and powersports engine builds, with components designed to support displacement upgrades, rebuild goals, torque gains, and performance tuning.
-80%

Cylinder Works HC Big Bore Cylinder Kit Kawasaki Brute Force / Teryx 750 2005-2014

Regular Price $403.61
Sale Price $403.61 Regular Price $2,018.07
-80%

Koso 150CC Big Bore Kit Honda Grom / Monkey 2022-2025

Regular Price $148.97
Sale Price $148.97 Regular Price $744.84
-75%

Drag Specialties Replacement Cylinders For Sportster 1200 1988-2003

Regular Price $88.08
Sale Price $88.08 Regular Price $352.31
-80%

S&S Cycle 129

Regular Price $932.07
Sale Price $932.07 Regular Price $4,660.37
-73%

BBR Motorsports Big Bore Kit

Regular Price $74.53
Sale Price $74.53 Regular Price $276.02
-80%

S&S Cycle Hooligan Big Bore Cam Kit For Harley Sportster

Regular Price $474.35
Sale Price $474.35 Regular Price $2,371.76
-80%

S&S Cycle 124

Regular Price $1,941.84
Sale Price $1,941.84 Regular Price $9,709.18
-80%

S&S Cycle High Compression 132

Regular Price $470.47
Sale Price $470.47 Regular Price $2,352.34
-80%

S&S Cycle 95

Regular Price $346.74
Sale Price $346.74 Regular Price $1,733.72
-77%

Koso 170cc Big Bore Kit Honda Grom 2014-2020

Regular Price $153.45
Sale Price $153.45 Regular Price $667.16
-80%

S&S Cycle 136

Regular Price $443.84
Sale Price $443.84 Regular Price $2,219.19
-80%

S&S Cycle 80

Regular Price $1,015.30
Sale Price $1,015.30 Regular Price $5,076.48
-80%

S&S Cycle 129

Regular Price $442.73
Sale Price $442.73 Regular Price $2,213.64
-80%

S&S Cycle 106

Regular Price $328.44
Sale Price $328.44 Regular Price $1,642.18
-80%

S&S Cycle Power Pack For Harley Twin Cam

Regular Price $928.19
Sale Price $928.19 Regular Price $4,640.95
-80%

S&S Cycle 124

Regular Price $1,941.84
Sale Price $1,941.84 Regular Price $9,709.18
-80%

S&S Cycle 74

Regular Price $1,015.30
Sale Price $1,015.30 Regular Price $5,076.48
-80%

S&S Cycle 124

Regular Price $425.81
Sale Price $425.81 Regular Price $2,129.03
-75%

BBR Motorsports Big Bore And Cam Kit

Regular Price $132.46
Sale Price $132.46 Regular Price $529.85
-80%

S&S Cycle 132

Regular Price $932.07
Sale Price $932.07 Regular Price $4,660.37
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