RE: The new H9 Sukhoi gets a BME!
RTK will find this thread and give you the answer you need. Keith did make a 105 before he did his own cylinders. I'd guess Keith sold you the engine with the updated crank with origional heads. That gives the 105cc specs. I also think the engine you have can accept the new heads and pistons to make it a 110cc should some harm come to your engine.