Big Bore KitsThere are 20 products.

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Showing 1 - 20 of 20 items

Shop Big Bore Kits for Pit Bikes

Ready to crank up your bike’s power? Our big bore kits are here to take your ride to the next level—whether you’re wrenching on a vintage beauty or a newer beast.

Dial in your Honda with honda-specific big bore kits for CRF50, CRF70, CT70, Z50, and XR50. These kits are packed with all the essentials—big bore cylinders, pistons, and more—for a killer upgrade that boosts performance and reliability.

Our big bore piston kits and cylinder big bore kits are precision-made to bump up displacement and smooth out your power delivery. Whether you’re chasing old-school vibes or modern speed, these big bore top end kits have you covered.

Get your bike breathing fire with our high-quality big bore kits and feel the difference every time you twist the throttle. Let’s make your ride rip!