I'm not in a hurry to get that clutch device. At $900 for the latest / greatest Core 3.0 EXP, it's very pricey. I had a fellow offer me a used Core 2.0 Non-EXP, and then he described his experience with it, why he was selling it. Apparently, stalling with that device mounted allows the cycle to roll backwards, downhill, when the engine stalls on a hillside. Without warning. Too late for braking... The clutch essentially thinks the system is in "neutral" at that time. People swear by them when they love them. This guy did not like that particular aspect of living with the Rekluse. When I read that, and considered his $$$ learning "experience", well, I'm not in a hurry... I agree but the advantages of the auto clutch outweigh it not locking gear on a hill, just keep the brake on "problem solved". 4strks in general pop stall without warning at lower rpms "with or without" an auto clutch but in a way that's the warning, keep the revs up a little. To take advantage of an auto clutch its best to be comfortable with the manual one first. Its more like icing on the cake.