I watched a video of how simple it was to remove and install the 400 engine laying the bike on it's side, after I'd laid it down on my own I had a DEVIL of a job as I had left the H/T coils on and hadn't removed the breather cover, it was a nightmare but got it out with a struggle. Didn't make the same mistake on rebuild and I didn't lay it down either, I wrapped Carling card around the frame so not the chip the paint, got a box the same height as frame and stood the engine on it and slide it across bit by bit on my own, with a bit of lifting.