Atul,

As far as I know, this motor isn't much different from any other YS in terms of breaking in. The only thing different is the CDI box, so I would just follow your normal break-in procedure for a YS. As far as I know the parts that are impacted by break in procedures are the same in the CDI as are in the DZ.

Regarding smoke, if your motor is new, it likely has oil that it's burning out from the factory. The smoke will not go away completely, from what I've seen with running low oil content fuel and I doubt you'll notice it much when it's in the air.

I'm not sure where your needle will end up at, but from what I've seen and the conversations that I've had with Richard, it will sound almost like it's missing when it's rich. The richer you are, the more of that you'll hear, but the motor shouldn't die. I've not tested that theory by getting the needle way out of where it should be, but I think you can get it out a good ways before it will start acting funny. The motor also doesn't change pitch too much around peak, and I do know that if you get it too lean on the high end, it won't like it, and if you're in the air and pull up, the motor will sag and die. If if it's a new motor, you'll end up running it rich anyway and start sneaking in on the needle a little at a time. I would leave it a few clicks rich of peak when you finally get it set and the motor is broken in fully.

I hope I answered your questions, and if you have anything else, please let me know.