<p>This is an oversize piston kit for the Aprilia RS125, 123 and 122 engines.</p>
<p>This piston <strong>is to be used in a cylinder fitted with a cast iron sleeve.</strong></p>
<p>Note<strong> you cannot just rebore a STD plated cylinder</strong> and use this piston becuse this piston must run in a cast-iron bore.</p>
<p>Piston kit contains piston, piston rings, gudgeon pin and 2 circlips.</p>
<p>Choose Piston Size 54,25 - 54,50 - 54,75</p>
<p><strong>Important:</strong><br /><br /><strong>The needle cage must be replaced with the piston.</strong></p>