[DW]

This kind of sh-t gives cors187 a hard on.
Turbo charged Lc4's.
I would take a guess you're running out of fuel when in boost. When you have all that gear hanging off the side of it guess work is very risky. I would be getting on a dyno or at least hooking up some kind of sniffer in the exhuast to see what it's air/fuel is doing. You could be blowing out the spark as well under boost.

 

[DW]

Has it ever run right with the turbo or is that a new addition?

 

[DW]

There was one for sale on the sunny coast a couple year back. If you had put this post up back then we may have been able to pick his brains.

I kept a picture of the bike as I was stirring up Cors187 with it.