Mike,

The problem is the washers as Troy stated. The adaptor is bottoming out in the head before it gets tight. I have 3 washers on my DZ160 and all is fine. I made a bracket which attaches to the YS mount boss and connects directly to the header via a spring clamp. The bracket is L shape if you can visualise it. I will try and get a picture for you.

I noticed in your photo that you dremeled a small recess for the fuel tube connected to the pump. You will need to dremel that more because the engine rockss from side to side by a fair amount especially when it kicks a little. You will find the tube will cut and the engine wont run properly.


Peter