bike runs great for short bursts , then will fall on its face , then it will retsart and idle fine and rev up but put a load on it , it and it wants to bogg out and die .

 

I'd check that the tank vent line is open and also has good fuel flow to the carb.You could also open the drain screw on the carb to see if fuel is getting past the needle and seat. If all that checks out then I'd do a compression check. If it runs for awhile and dies and starts back up,could be rings may be loosing their seal against the cylinder wall. The Kasea 2 strokes used the same engines as Polaris,Eton,Aeon and a couple others. Polaris called for a minimum of 115 psi compression on both their 50 and 90 machines.

 

Fix it?

 

Another pet peeve of mine are the ones that never report back. Maybe he will..