Athena Big Bore Kits - Yamaha S3-Cat-Luggage-Softluggage-Leatherandcustom Silica is great for boosting

Silica is great for boosting grip levels in both cold and wet conditions

Needle Bearings (Little End Bearings)

Is also suitable for delicate surfaces such as magnesium

High tensile steel

Perfect fit to the Ignition Cover and the Clutch Cover

Athena Big Bore Kits - Yamaha S3-Cat-Luggage-Softluggage-Leatherandcustom Silica is great for boostingGet more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion. Spare pistons, rings, and gaskets also available. Can't see your bike listed here, or the product you want is not in stock? Get in touch to see if there's a kit for your model and ask about price and availability.