Sunday, October 30, 2016

Project Bike: Dad's XT500 - Engine tear down

 Dad started tearing into the engine and he figured out what the ticking in the top end was. Look closely at the contact pad on the exhaust valve rocker arm. It has worn through the hard surfacing. Looks like we'll need new rocker arms and a cam. These engines had a known problem of oil starvation to the exhaust rocker pad. While Dad had the bike he moved the oil line to the exhaust side to try and help avoid these issues. Maybe it was starved for oil at some point.