I don't have any videos and I don't ride a Challenger but here are the basics with any brand or model of bike.
1) you need to be in the friction/grey area zone with the clutch. There has to be power to the rear wheel. Do not pull in the clutch on a full lock leaned over turn. The bike will fall over. It's easier to be in the grey area prior to making the turn rather than trying to find it after you started the turn.
2) look where you want to go. The bike goes where you are looking. If you are looking at an obstacle you don't want to hit the bike will drift toward it. As soon as you are committed to the u-turn, turn your head as far as you can and look over your shoulder.
3) the bike's turning radius goes off the front wheel. Turn the front wheel/dog leg in the opposite direction before starting your turn.
4) lightly and I mean lightly drag the rear brake while making the turn. Too much rear brake and your fighting the bike. The turn won't be smooth. Don't use the front brake or the bike will fall over.
5) you don't need much throttle. Just keep a nice steady throttle. The speed of the turn is determined by the clutch not the throttle.
6) sit upright with a little counter lean and slide a little forward in your seat. Do not lean your body or drop your shoulder towards the turn.
The easiest way to practice this is in an empty parking lot. Start practicing your turns wide and tighten them up as you get better. It just takes practice and it is a perishable skill. It will click one day when you learn to trust the bike.
The Indians do not turn as tight as the HD's. I disagree with the higher handlebars making turns easier. Your putting your hands farther away from you especially with the right turns.
You will hear some people say you don't need this skillset. It's safer when your feet are on the floorboards instead of duckwalking the bike and you look way cooler. LOL
You can also check out ProRider for videos and training.
Motor officer skills for all riders. Check out our nationwide ProRider locations and learn more about ProRider! ProRider is the largest advanced motorcycle training school in the world that specializes in teaching the motor officer techniques.
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One word of caution if the bike is falling over do not put your foot down to save it. It is one of the most natural things we do and a very hard habit to break. I was guilty of it just like almost every rider learning these techniques. I have seen some bad injuries from this when the rider's leg was caught by the saddlebag.
Good luck with your training and be safe,
Phil