I was following along with the Haynes manual on this one. They use the BMW TDC bolt to lock the crank and then take off the bolt. I made sure to buy the strongest bolt I could (grade 8 or something). The first and best option would be to leave the rear swing arm, tire, and chain in place and use the method described above where you leave the bike in gear, have someone hold down the rear brake pedal to keep the engine from rotating over and then use a breaker bar to spin off the nut. I did not have that option because I lost my counter sprocket splines and had no way of stopping the motor from rotating. The sequencing of the steps to dismantle the engine can vary in these first steps. It is easiest to get the clutch basket nut and the alternator nut off while the engine is still in the bike so you can use the weight and leverage of the bike to your advantage. Once this is done, you can then drop the engine.