In my experience, the advantage of synthetic is its much better resistance to heat breakdown compared to conventional oils. It does not degrade at high temps as quickly as regular oils, This is a BIG advantage is a race engine or a daily driver. Two stroke oil is no different. Better is better, period.
The best way in my opinion is to break it in on conventional oil and then switch to synthetic. But I agree synthetic does not PREVENT break in, it just takes a lot longer.
The only thing not to like about synthetic oil is the price.
I think ya got it right maniac, A synthetic is way too slik to do a proper break in on these engines. A real engine were you expect to get 100,000 miles (or more,) out of it will, eventually, break in on a synthetic. But some say it never really breaks in completly with a synthetic. And these little chinese made Russian knock off's are probably not going to get to 100,000 miles, even on a synthetic. SO, Break in with regular oil, Then switch to a Synthetic if ya want. I'm just NOT gonna ride my bike 1,000 miles before it breaks in and I can REALLY ride it.
Also, On a high milage engine I don't think you can just go straight to a synthetic. Regular oil forms a seal between the rings and the cylinder. The thinner synthetics, having smaller molecules, wouldn't be able to form this seal. An engine that used a synthetic from a low milage stage will break in with a tighter seal between the rings and cylinder. So you can go from a synthetic to a regular oil, You just can't go from a regular oil to a synthetic, especially on a high milage engine. I think this is the problem 2door was having with one of his high milage engines.
I also think your right about cooling. But I think the oil is only a very small part of this. Regardless of the oil used the main cooling component is fuel. A lot more fuel flows through the engine then oil, Making this the main cooling source. You might reduce the temp a degree or two with synthetics, But at normal operating temps this difference would be negligible.
And when I said synthetic oil is not REAL oil I was only half right. When synthetics first came out, YEARS AGO, (yeah, I'm old.) They were developed using sources other than crude. Then, cost being the major factor, The oil companies firured out how to wrangle the crude oil molecules into what we now know as synthetic oil. So, They changed the molecular structure of oil into something else, which still makes it something other than REAL oil.
And chevelle, I want to apoligize for the degree in B.S. remark. This was uncalled for. I still think if you're going to tell someone to educate themselves you should at least point them in the right direction. When I think, in my humble opinion, that a person needs to know something I will do my best to recommend a source for this. And although I have some degree's of my own, I don't need to dig them out of the bottom of my drawer and use them to prove I know something.
IT'S YOUR BIKE, BUILD IT YOUR WAY,
(Then use whichever oil that feels right to YOU.)
fatdaddy.
More light reading. But, like everyone else, this guy might have a bias of his own.
http://www.sea-doo.net/techarticles/oil/oil.htm