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My Ride: 2006 Yamaha YZ125
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Dirt Bike Big Bore Kits

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11 Results

Exact Fit
$40 Fast cash

Athena
Big Bore Kit

$1018.99
Sale
Save 10%
4 out of 5 stars (16) reviews
Exact Fit
New
$33 Fast cash

Cylinder Works
Standard Bore Cylinder Kit

$565.21
Sale
Save 15%
4 out of 5 stars (12) reviews
Exact Fit
New
$30 Fast cash

Cylinder Works
Cylinder

$511.05
Sale
Save 5%
4.5 out of 5 stars (27) reviews
Exact Fit
$14 Fast cash
Exact Fit
$25 Fast cash

Athena
Factory Cylinder Kit

$924.99
Sale
Save 10%
4 out of 5 stars (13) reviews
Exact Fit
$32 Fast cash

Cylinder Works
Top End Kit With Cylinder - 2-Stroke

$635.36
Sale
Save 13%
5 out of 5 stars (1) review
Exact Fit
$4 Fast cash

Athena
Big Bore Gaskets

$67.99
Sale
Save 10%
4 out of 5 stars (6) reviews
Exact Fit
$9 Fast cash
Colors for VHM Billet Cylinder Head

VHM
Billet Cylinder Head

$279.99
Exact Fit
$2 Fast cash
Exact Fit
$16 Fast cash

Cylinder Works
Cylinder Head Kit

$138.65
Sale
Save 5%
5 out of 5 stars (4) reviews
Exact Fit
$2 Fast cash

Athena
Factory Cylinder Kit Gaskets

$48.99
Sale
Save 11%
3.5 out of 5 stars (3) reviews

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.