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Dirt Bike Big Bore Kits

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34 Results

New
$40 Fast cash

Athena
Big Bore Kit
$527.36 - $1348.16
Sale
Up to 10%
4 out of 5 stars (16) reviews
New
$42 Fast cash

Cylinder Works
Big Bore Kit
$499.91 - $1532.30
Sale
Up to 5%
4.5 out of 5 stars (27) reviews
Video Available
New
$29 Fast cash

Cylinder Works
Standard Bore Cylinder Kit
$336.77 - $1005.51
Sale
Up to 15%
4 out of 5 stars (12) reviews
Video Available
$25 Fast cash

Athena
Factory Cylinder Kit
$733.46 - $838.76
Sale
Up to 10%
4 out of 5 stars (13) reviews
$9 Fast cash
Colors for VHM Billet Cylinder Head

VHM
Billet Cylinder Head
$229.99 - $319.99
$20 Fast cash

Cylinder Works
Top End Kit With Cylinder - 4-Stroke
$422.16 - $948.00
Sale
Up to 17%
5 out of 5 stars (7) reviews
$35 Fast cash

Cylinder Works
Big Bore Cylinder
$280.77 - $1178.96
Sale
Up to 5%
New
$18 Fast cash

Cylinder Works
Cylinder
$216.77 - $992.99
Sale
Up to 5%
4.5 out of 5 stars (27) reviews
Video Available
New
$32 Fast cash

Cylinder Works
Standard Bore High Compression Cylinder Kit
$433.77 - $1150.86
Sale
Up to 15%
5 out of 5 stars (4) reviews
Video Available
$2 Fast cash

KTM PowerParts
Engine Brace Set
$86.99
$18 Fast cash

Athena
Stock Cylinder Kit
$314.06 - $596.66
Sale
Up to 10%
$29 Fast cash

Athena
Big Bore Stroker Kit
$962.96
Sale
Save 10%
3 out of 5 stars (2) reviews
$2 Fast cash

VHM
Cylinder Head Insert
$56.99 - $64.99
$32 Fast cash

Cylinder Works
Top End Kit With Cylinder - 2-Stroke
$628.36 - $757.65
Sale
Up to 14%
5 out of 5 stars (1) review
$16 Fast cash

Cylinder Works
Cylinder Head Kit
$138.65 - $600.06
Sale
Up to 15%
5 out of 5 stars (4) reviews

Moose
Replacement Cylinder
$366.95 - $506.95
$34 Fast cash

KTM PowerParts
300 Factory Kit
$1143.99 - $1362.99
$4 Fast cash

Athena
Big Bore Gaskets
$20.77 - $120.99
Sale
Up to 10%
4 out of 5 stars (6) reviews
$12 Fast cash

Wiseco
12.5:1 Big Bore Kit
$394.97
Sale
Save 15%
$5 Fast cash

Pro Circuit
Cylinder Head Cover
$169.95
$4 Fast cash

Cylinder Works
Big Bore Gasket Set
$29.99 - $163.35
Sale
Up to 5%
5 out of 5 stars (4) reviews
Video Available
$31 Fast cash

KTM PowerParts
150 Factory Kit
$1209.99
$63 Fast cash

GYTR
Ported Cylinder Head Assembly
$1999.99 - $2099.99
5 out of 5 stars (2) reviews
$34 Fast cash

GasGas Technical Accessories
300 Factory Kit
$1143.99 - $1362.99
$10 Fast cash

BBR
Big Bore Kit
$359.95
5 out of 5 stars (1) review
$10 Fast cash

BBR
Big Bore Cylinder
$209.95
New
$31 Fast cash

Athena
Big Bore Kit With GET Boost
$1049.95
$4 Fast cash

Nihilo
Interchangeable Head Dome
$130.99
$2 Fast cash

Husqvarna Technical Accessories
Engine Brace Set
$86.99

Pro Circuit
Front Engine Brackets
$51.95
$1 Fast cash

Husqvarna Technical Accessories
Factory Cylinder Head Combustion Chamber Insert
$25.77
Clearance
Save 80%
$2 Fast cash

GasGas Technical Accessories
Engine Brace Set
$86.99
$2 Fast cash

Athena
Factory Cylinder Kit Gaskets
$44.96 - $64.99
Sale
Up to 10%
3.5 out of 5 stars (3) reviews

VHM
Billet Cylinder Head With Insert
$281.99 - $379.99
Sale
Up to 27%

Dirt Bike Big Bore Kits

Install a big bore kit for optimum power in your dirt bike to tackle the roughest terrain, gnarliest hills and get an edge on the competition. Find a wide range of dirt bike big bore kits at MotoSport that fit many makes, models and years including CRF125f and other 125cc pit bikes. When deciding on a big bore kit for your ride, use the Fitment Expert on the product page to ensure the right big bore kit for your dirt bike. Most big bore kits include a cylinder, piston, ring(s), pin, clips and to p-end big bore gasket kit. If you want help finding the right big bore for your dirt bike please call 503-783-5645 to talk to a gearhead who can answer questions and point you in the right direction so you can make an informed buying purchase.