I believe it's been posted that 5 w30 only come in synth and synth shouldn't be used for break in. (Kato I think..)
For myself, 5/30 sounds like snowmobile oil. Even the synth I used didn't have a 5 in it. I bet it's great if you start your bike a lot. But I'm no oil pro. I'm sure others will help you on that.
http://www.chinariders.net/modules.p...t=4721&start=0
Here is the other oil thread that is also current. It talks about 5/30. Hope it helps.