Yamaha YZF-R1B 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

CONNECTING RODS AND PISTONS5-75EAS26030REMOVING THE CONNECTING RODS ANDPISTONSThe following procedure applies to all of theconnecting rods and pistons.1. Remove:• Connecting rod cap “1”• Connecting rod• Big end bearingsTIP• Identify the position of each big end bear-ing so that it can be reinstalled in its origi-nal place.• After removing the connecting rods andconnecting rod caps, care should be takennot to damage the mating surfaces of theconnecting rods and connecting rod caps.2. Remove:• Piston pin clips “1”• Piston pin “2”• Piston “3”ECA13810Do not use a hammer to drive the pistonpin out.TIP• For reference during installation, put identifi-cation marks on the piston crown.• Before removing the piston pin, deburr thepiston pin clip groove and the piston pin borearea. If both areas are debarred and the pis-ton pin is still difficult to remove, remove itwith the piston pin puller set “4”.3. Remove:• Top ring• 2nd ring• Oil ringTIPWhen removing a piston ring, open the endgap with your fingers and lift the other side ofthe ring over the piston crown.4. Remove:• Cylinder• Cylinder gasket• Cylinder stud boltsEAS24390CHECKING THE CYLINDER AND PISTON1. Check:• Piston wall• Cylinder wallVertical scratches → Replace the cylin-der, and replace the piston and pistonrings as a set.Piston pin puller set90890-01304Piston pin pullerYU-01304Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk