Cylinder Works 20-23 Yamaha WR 250 F 250cc +3mm Big Bore Cylinder Kit 270cc 13.8:1 Comp. 80mm

Built from a strong 2618 aluminum alloy, this big bore cylinder kit from Cylinder Works is designed to increase your Yamaha WR 250 F's engine displacement to 270cc. This kit is a direct replacement for your stock cylinder, but it's engineered to give you a significant boost in performance. The increased displacement, combined with a 13.8:1 compression ratio, means you'll feel a noticeable improvement in horsepower and overall engine power.

What makes this kit a smart choice is that it comes as a complete package. You get the big bore cylinder itself, a hand-matched Vertex piston that's specifically sized for this application, and a full top-end gasket kit with all the necessary o-rings. This all-in-one approach saves you the hassle and cost of sourcing individual OEM parts. The cylinder's appearance is designed to look like the stock unit, but its internal design is all about performance, giving you that extra edge on the trail or track.

When you're looking to get more out of your WR 250 F's engine, this kit offers a well-built solution. It's a substantial upgrade that changes the character of your bike's power delivery, making it feel more potent and responsive. If you're aiming to rebuild your top end and want to achieve a higher level of performance, this big bore kit is a solid option to consider.