Stop settling for stock performance and give your ride the extra muscle it deserves. The L.A. Sleeve Big Bore Sleeve (H5445) is the ultimate upgrade for riders looking to transform their 400cc machine into a 440cc powerhouse (on some models). Crafted from high-strength chrome-moly alloy, this four-stroke sleeve is built to handle the increased heat and pressure of high-performance riding. The outside diameter is precision centerless ground to an exact fit, making the installation process smoother and more reliable for your shop.
This isn't just a replacement part; it’s a total engine evolution. By increasing your bore size to 89.00mm, you’ll feel a significant gain in torque and pull that stock sleeves simply can’t match. Please note that the inside diameter requires boring and honing to fit your specific piston after installation and you'll need to grab your piston kit and top-end gaskets separately to finish the build. Upgrade today at Cheetah's Powersports and experience the difference up to 40 extra CCs can make on the trail.
Features:
- Takes the 400 up to a strong 440cc
- Four-stroke cylinder sleeve made from chrome-moly alloy
- Outside diameter precision centerless ground to exact size for ease of installation
- Inside diameter must be bored and honed to size piston after installation
- Big bore size is 89.00mm
- Order the piston kit and top end gasket separately
- Turns '96-'04 Honda XR400R from 400 cc into 440 cc.
- Turns '99-'14 Honda TRX400EX from 400 cc to 425 cc.
- Big Bore Sleeve may require special machining and/or machining of cases or cylinder head.
- Product images may only represent the class of product and not the specific model.
